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• 31. [Article] Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity Information Report number 2009-04

  Abstract -- Accurate estimates of female age or length at maturity are critical for the conservation of exploited fish stocks. Age at maturity is particularly important, as it strongly influences population ...

  Citation × Citation Citation Abstract Copy Title: Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity Information Report number 2009-04 Abstract -- Accurate estimates of female age or length at maturity are critical for the conservation of exploited fish stocks. Age at maturity is particularly important, as it strongly influences population model estimates of sustainable harvest rates (Clark 1991) and, along with mean body size, is an important predictor of the risk of overexploitation (Reynolds et al. 2005). For many U.S. west coast groundfish stocks, data on age and length at maturity is of poor quality. The age at maturity curves used in many stock assessments are currently based on macroscopic (visual) assessment of ovary condition. However, there is abundant evidence that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). The age data that have been used to develop curves of age at maturity for some species is also based on outdated ageing methods, such as surface aging of otoliths, as opposed to the more accurate “break and burn” technique (Barss 1989, Wyllie Echeverria 1987, Chilton and Beamish 1982). For other species, such as cabezon (Scorpaenichthys marmoratus), accurate age and growth data, based on thin-sectioning of otoliths, have just recently been developed (Grebel and Cailliet 2003). Information on age and length at maturity that is based on histological evaluation of maturity status and modern ageing techniques is therefore needed for many U.S. west coast groundfish species. Histology-based maturity data has been developed for some U.S. west coast groundfish species. These include darkblotched rockfish (Sebastes crameri, Nichol and Pikitch 1994), petrale sole (Eopsetta jordani, Hannah et al. 2002), greenstriped rockfish (Sebastes elongatus, Shaw and Gunderson 2006), Pacific ocean perch (Sebastes alutus, Hannah and Parker 2007) and rosethorn rockfish (Sebastes helvomaculatus, Shaw and Gunderson 2008). We report here on the development of similar data for female yelloweye rockfish (Sebastes rubberimus) and cabezon. Title: Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity Information Report number 2009-04 Abstract -- Accurate estimates of female age or length at maturity are critical for the conservation of exploited fish stocks. Age at maturity is particularly important, as it strongly influences population model estimates of sustainable harvest rates (Clark 1991) and, along with mean body size, is an important predictor of the risk of overexploitation (Reynolds et al. 2005). For many U.S. west coast groundfish stocks, data on age and length at maturity is of poor quality. The age at maturity curves used in many stock assessments are currently based on macroscopic (visual) assessment of ovary condition. However, there is abundant evidence that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). The age data that have been used to develop curves of age at maturity for some species is also based on outdated ageing methods, such as surface aging of otoliths, as opposed to the more accurate “break and burn” technique (Barss 1989, Wyllie Echeverria 1987, Chilton and Beamish 1982). For other species, such as cabezon (Scorpaenichthys marmoratus), accurate age and growth data, based on thin-sectioning of otoliths, have just recently been developed (Grebel and Cailliet 2003). Information on age and length at maturity that is based on histological evaluation of maturity status and modern ageing techniques is therefore needed for many U.S. west coast groundfish species. Histology-based maturity data has been developed for some U.S. west coast groundfish species. These include darkblotched rockfish (Sebastes crameri, Nichol and Pikitch 1994), petrale sole (Eopsetta jordani, Hannah et al. 2002), greenstriped rockfish (Sebastes elongatus, Shaw and Gunderson 2006), Pacific ocean perch (Sebastes alutus, Hannah and Parker 2007) and rosethorn rockfish (Sebastes helvomaculatus, Shaw and Gunderson 2008). We report here on the development of similar data for female yelloweye rockfish (Sebastes rubberimus) and cabezon. Close

• 32. [Article] Exploring functional links between circadian clocks, neurodegeneration, and aging in Drosophila melanogaster

  Circadian clocks are endogenous molecular mechanisms that coordinate daily rhythms in gene expression, cellular activities, and physiological functions with external day/night cycles. Breakdown of circadian ...

  Citation × Citation Citation Abstract Copy Title: Exploring functional links between circadian clocks, neurodegeneration, and aging in Drosophila melanogaster Author: Rakshit, Kuntol Circadian clocks are endogenous molecular mechanisms that coordinate daily rhythms in gene expression, cellular activities, and physiological functions with external day/night cycles. Breakdown of circadian rhythms such as sleep/wake cycles is associated with the onset of several neurological diseases; however, it is not clear whether disruption of rhythms is a symptom or cause of neurodegeneration, or both. To address this important question, circadian rhythms were disrupted by both genetic and environmental manipulations in Drosophila mutants prone to neurodegeneration. This led to shortening of lifespan, premature accumulation of oxidative and nervous damage during aging, and overall decline in healthspan, suggesting that circadian clocks may be causally involved in neuroprotective pathways in aging Drosophila. Recent evidence suggests bidirectional relationships between circadian rhythms and aging. While disruption of the clock mechanism accelerates aging and age-related pathologies in mammals, output rhythms of sleep and hormonal fluctuations tend to deteriorate during aging in humans, rodents, and fruit flies. To understand whether this decay is caused by defects in the core transcriptional clock, or weakening of the clock output pathways, a comprehensive study on age-related changes in the behavioral and molecular circadian rhythms was conducted using the fruit fly as a model organism. Aging caused disruption of rest/activity patterns and lengthening of the free-running period of the circadian locomotor activity rhythm. Transcriptional oscillations of four genes involved in the clock mechanism, period, timeless, Par domain protein 1ε, and vrille, were significantly reduced in heads, but not in bodies of aging flies. It was further determined that reduced transcription of these genes is not caused by the deficient expression of their activators, encoded by Clock and cycle genes. Moreover, transcriptional activation by CLOCK-CYCLE complexes is impaired despite reduced levels of the PERIOD repressor protein in old flies. These data suggest that aging alters the properties of the core transcriptional clock in flies such that both the positive and the negative limbs of the clock are attenuated. In fruit flies, the protein CRYPTOCHROME (CRY) acts in a cell-autonomous manner to synchronize circadian oscillations with light-dark cycles. The oscillatory amplitude of CRY is significantly dampened in heads of old flies at both mRNA and protein levels. Rescue of CRY using the binary GAL4/UAS system in old flies significantly enhanced the dampened molecular oscillations of several clock genes, and also strengthened the locomotor activity rhythms. There was a remarkable extension of healthspan in flies with elevated CRY. Conversely, CRY deficient mutants accumulated greater oxidative damage and showed accelerated functional decline. Interestingly, rescue of CRY in central clock neurons alone was not sufficient to restore rest/activity rhythms or extend healthspan. These data suggest novel anti-aging functions of CRY and indicate that peripheral clocks play an active role in delaying behavioral and physiological aging. Taken together, research conducted for this dissertation is a first attempt to elucidate functional links between circadian clocks, neurodegeneration, and aging. While previous evidence linking these processes was of correlative nature, functional studies conducted in this dissertation demonstrate that disruption of circadian clocks causes neurodegeneration and aging. While aging disrupts circadian rhythms at the molecular and behavioral levels, restoration of these rhythms can delay aging and improve healthspan in Drosophila. Owing to the conserved nature of clocks, novel insights obtained from this research can illuminate future translational research aimed to extend human healthspan. Title: Exploring functional links between circadian clocks, neurodegeneration, and aging in Drosophila melanogaster Author: Rakshit, Kuntol Circadian clocks are endogenous molecular mechanisms that coordinate daily rhythms in gene expression, cellular activities, and physiological functions with external day/night cycles. Breakdown of circadian rhythms such as sleep/wake cycles is associated with the onset of several neurological diseases; however, it is not clear whether disruption of rhythms is a symptom or cause of neurodegeneration, or both. To address this important question, circadian rhythms were disrupted by both genetic and environmental manipulations in Drosophila mutants prone to neurodegeneration. This led to shortening of lifespan, premature accumulation of oxidative and nervous damage during aging, and overall decline in healthspan, suggesting that circadian clocks may be causally involved in neuroprotective pathways in aging Drosophila. Recent evidence suggests bidirectional relationships between circadian rhythms and aging. While disruption of the clock mechanism accelerates aging and age-related pathologies in mammals, output rhythms of sleep and hormonal fluctuations tend to deteriorate during aging in humans, rodents, and fruit flies. To understand whether this decay is caused by defects in the core transcriptional clock, or weakening of the clock output pathways, a comprehensive study on age-related changes in the behavioral and molecular circadian rhythms was conducted using the fruit fly as a model organism. Aging caused disruption of rest/activity patterns and lengthening of the free-running period of the circadian locomotor activity rhythm. Transcriptional oscillations of four genes involved in the clock mechanism, period, timeless, Par domain protein 1ε, and vrille, were significantly reduced in heads, but not in bodies of aging flies. It was further determined that reduced transcription of these genes is not caused by the deficient expression of their activators, encoded by Clock and cycle genes. Moreover, transcriptional activation by CLOCK-CYCLE complexes is impaired despite reduced levels of the PERIOD repressor protein in old flies. These data suggest that aging alters the properties of the core transcriptional clock in flies such that both the positive and the negative limbs of the clock are attenuated. In fruit flies, the protein CRYPTOCHROME (CRY) acts in a cell-autonomous manner to synchronize circadian oscillations with light-dark cycles. The oscillatory amplitude of CRY is significantly dampened in heads of old flies at both mRNA and protein levels. Rescue of CRY using the binary GAL4/UAS system in old flies significantly enhanced the dampened molecular oscillations of several clock genes, and also strengthened the locomotor activity rhythms. There was a remarkable extension of healthspan in flies with elevated CRY. Conversely, CRY deficient mutants accumulated greater oxidative damage and showed accelerated functional decline. Interestingly, rescue of CRY in central clock neurons alone was not sufficient to restore rest/activity rhythms or extend healthspan. These data suggest novel anti-aging functions of CRY and indicate that peripheral clocks play an active role in delaying behavioral and physiological aging. Taken together, research conducted for this dissertation is a first attempt to elucidate functional links between circadian clocks, neurodegeneration, and aging. While previous evidence linking these processes was of correlative nature, functional studies conducted in this dissertation demonstrate that disruption of circadian clocks causes neurodegeneration and aging. While aging disrupts circadian rhythms at the molecular and behavioral levels, restoration of these rhythms can delay aging and improve healthspan in Drosophila. Owing to the conserved nature of clocks, novel insights obtained from this research can illuminate future translational research aimed to extend human healthspan. Close

• 33. [Article] A study of the perceptual parameters of voice in aging females

  An interest in understanding the aging processes, as they relate to voice, has prompted research investigating physiological, acoustical, and perceptual attributes of the aging vocal mechanism. Recently, ...

  Citation × Citation Citation Abstract Copy Title: A study of the perceptual parameters of voice in aging females Author: Mathers, Barbara Ann Year: 1978 An interest in understanding the aging processes, as they relate to voice, has prompted research investigating physiological, acoustical, and perceptual attributes of the aging vocal mechanism. Recently, it has been demonstrated that perceptual parameters, in older male voices, differentiate speakers according to age estimations, as determined by a group of listeners. The purpose of this study was to determine the perceptual characteristics of the female voice which are associated with perceived age, as contrasted to chronological age. Title: A study of the perceptual parameters of voice in aging females Author: Mathers, Barbara Ann Year: 1978 An interest in understanding the aging processes, as they relate to voice, has prompted research investigating physiological, acoustical, and perceptual attributes of the aging vocal mechanism. Recently, it has been demonstrated that perceptual parameters, in older male voices, differentiate speakers according to age estimations, as determined by a group of listeners. The purpose of this study was to determine the perceptual characteristics of the female voice which are associated with perceived age, as contrasted to chronological age. Close

• 34. [Article] Age and the comprehension of spatial adjectives

  The purpose of this study was to determine the significance of chronological age on the comprehension of spatial adjectives in children. Specifically, the investigation set out to determine the age levels ...

  Citation × Citation Citation Abstract Copy Title: Age and the comprehension of spatial adjectives Author: Cassidy, Barbara Ann Year: 1980 The purpose of this study was to determine the significance of chronological age on the comprehension of spatial adjectives in children. Specifically, the investigation set out to determine the age levels at which children comprehend the polar forms of various spatial adjectives and to determine the difference in age levels of comprehension of unmarked versus marked adjective forms. Seventy children between the ages of two years, +/-2 months and eight years, + 2 months, selected on the basis of chronological age, normal receptive vocabulary recognition and normal hearing, participated as subjects. Title: Age and the comprehension of spatial adjectives Author: Cassidy, Barbara Ann Year: 1980 The purpose of this study was to determine the significance of chronological age on the comprehension of spatial adjectives in children. Specifically, the investigation set out to determine the age levels at which children comprehend the polar forms of various spatial adjectives and to determine the difference in age levels of comprehension of unmarked versus marked adjective forms. Seventy children between the ages of two years, +/-2 months and eight years, + 2 months, selected on the basis of chronological age, normal receptive vocabulary recognition and normal hearing, participated as subjects. Close

• 35. [Article] Issues for Professionals Working with Cerebral Palsied Individuals

  This practicum is the result of our participation with a grant of national significance from the Developmental Disabilities Office. The project's inquiry is to describe the aging and aged developmentally ...

  Citation × Citation Citation Abstract Copy Title: Issues for Professionals Working with Cerebral Palsied Individuals Author: Marquis, Joan, Thompson, Beth, Girdlestone, Wendy Year: 1978 This practicum is the result of our participation with a grant of national significance from the Developmental Disabilities Office. The project's inquiry is to describe the aging and aged developmentally disabled and to develop professional curricula based upon the findings. There are three major objectives for the grant: 1) to conduct a comprehensive survey of the aging and the aged population, 2) to develop curricula for the training of health-care professional and 3) to consult at the supervisory level with national, state and community agencies. The developmentally disabled population studied by the grant includes cerebral palsied individuals over twenty-one years of age and mentally retarded individuals over forty years of age. Title: Issues for Professionals Working with Cerebral Palsied Individuals Author: Marquis, Joan, Thompson, Beth, Girdlestone, Wendy Year: 1978 This practicum is the result of our participation with a grant of national significance from the Developmental Disabilities Office. The project's inquiry is to describe the aging and aged developmentally disabled and to develop professional curricula based upon the findings. There are three major objectives for the grant: 1) to conduct a comprehensive survey of the aging and the aged population, 2) to develop curricula for the training of health-care professional and 3) to consult at the supervisory level with national, state and community agencies. The developmentally disabled population studied by the grant includes cerebral palsied individuals over twenty-one years of age and mentally retarded individuals over forty years of age. Close

• 36. [Article] A comparison of preschool scores on the PPVT-R and the TELD

  The purpose of this study was to compare PPVT-R age equivalents with language ages from the Test of Early Language Development - TELD 2 (Hresko, Reid, and Hammill, 1981) for a preschool population. This ...

  Citation × Citation Citation Abstract Copy Title: A comparison of preschool scores on the PPVT-R and the TELD Author: Schneider, Diana Year: 1985 The purpose of this study was to compare PPVT-R age equivalents with language ages from the Test of Early Language Development - TELD 2 (Hresko, Reid, and Hammill, 1981) for a preschool population. This study sought to find the strength of association between the PPVT-R age equivalents and the TELD language ages. The subjects used in the study were 54 preschool children ranging in age from 3-6 through 4-7 years. Normal children were selected for the study based on their chronological age, sex, and socioeconomic status - SES. Title: A comparison of preschool scores on the PPVT-R and the TELD Author: Schneider, Diana Year: 1985 The purpose of this study was to compare PPVT-R age equivalents with language ages from the Test of Early Language Development - TELD 2 (Hresko, Reid, and Hammill, 1981) for a preschool population. This study sought to find the strength of association between the PPVT-R age equivalents and the TELD language ages. The subjects used in the study were 54 preschool children ranging in age from 3-6 through 4-7 years. Normal children were selected for the study based on their chronological age, sex, and socioeconomic status - SES. Close

• 37. [Article] Aging and Equity in the Greater Portland Metropolitan Region

  Aging and Equity in the Greater Portland Metropolitan Region discusses the opportunities and needs created by the increase in older adults in the region. The 65 and older population is expected to more ...

  Citation × Citation Citation Abstract Copy Title: Aging and Equity in the Greater Portland Metropolitan Region Author: DeLaTorre, Alan Kenneth, Neal, Margaret B. Year: 2014 Aging and Equity in the Greater Portland Metropolitan Region discusses the opportunities and needs created by the increase in older adults in the region. The 65 and older population is expected to more than double over the next two decades, to over half a million people. Planning for the inevitable and unprecedented aging of our population provides an opportunity to improve our environments while becoming a leader in the push to create sustainable, equitable, and age-friendly communities. Title: Aging and Equity in the Greater Portland Metropolitan Region Author: DeLaTorre, Alan Kenneth, Neal, Margaret B. Year: 2014 Aging and Equity in the Greater Portland Metropolitan Region discusses the opportunities and needs created by the increase in older adults in the region. The 65 and older population is expected to more than double over the next two decades, to over half a million people. Planning for the inevitable and unprecedented aging of our population provides an opportunity to improve our environments while becoming a leader in the push to create sustainable, equitable, and age-friendly communities. Close

• 38. [Article] Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2013

  The dataset also includes: Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2012 (prepared January 2013) Estimates of Population ...

  Citation × Citation Citation Abstract Copy Title: Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2013 Author: Portland State University. Population Research Center, Proehl, Risa Year: 2014 The dataset also includes: Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2012 (prepared January 2013) Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2011 (prepared January 2011) Title: Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2013 Author: Portland State University. Population Research Center, Proehl, Risa Year: 2014 The dataset also includes: Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2012 (prepared January 2013) Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2011 (prepared January 2011) Close

• 39. [Article] Aging and the Semantic Differential: Semantic Stability in the Measurement of Social Evaluation

  The purpose of this investigation was to assess the validity of utilizing the same semantic differential test as a measure of social evaluation for persons of different ages. The semantic differential, ...

  Citation × Citation Citation Abstract Copy Title: Aging and the Semantic Differential: Semantic Stability in the Measurement of Social Evaluation Author: Petersen, Marilyn Diane Year: 1976 The purpose of this investigation was to assess the validity of utilizing the same semantic differential test as a measure of social evaluation for persons of different ages. The semantic differential, a rating technique by which judgments of stimuli are made on seven-interval bipolar descriptive continua called "scales", currently receives widespread usage as a measure of attitudes toward aging and the elderly. However, a lack of semantic stability across stimuli and across subjects, known, respectively, as "concept-scale" and "subject2 scale" interaction, has been found to occur with the technique in various areas of research. That such a lack of stability might occur across stimuli and/or subjects of different ages is suggested by the existence of . di fferences between people of different ages which affect both the appearance and functioning of the individual. These differences derive from the biological aging process, the life cycle process, and the social change process. This study investigated whether such cross-age differences are of sufficient severity to cause people of different ages to be perceived as different classes of stimuli and/or to perceive others as different populations of subjects. Ratings of eight videotaped stimulus models were made by 60 younger (aged 22 to 32) and 60 older (aged 60 and older ) volunteer subjects on a semantic differential test composed of 38 scales. The stimulus models, consisting of four younger and four older adults, were non-actors, unknown to the rating subjects, and presented for one minute in a standardized visual format and without sound. Of the 38 scales used, seven were selected as reference scales from earlier studies, 30 were suggested by a volunteer "generating" sample of 30 younger and JO older subjects, and one (young/old) was included as a check on the perceived ages of the stimulus models. Scale scores were factor analyzed to establish the underlying factor structure of social evaluation and to ascertain whether it rema1ned stable across stimulus model and subject age levels. Four separate factor analyses were performed -- younger stimulus models/younger subjects, younger stimulus models/older subjects, older stimulus J models/older subjects, and older stimulus models/younger subjects -- permitting comparisons between the factor matrices for concept-scale and subject-scale interaction. Three factors were defined by each of the four separate factor analyses of the scales. Factors A and B were found by two different methods of assessing factor similarity (inspection and coefficients of congruence) to be highly similar across both stimulus model and subject age levels; Factor C (a weakly defined factor) was found to be similar only for the older stimulus models across subject age levels. An examination of the scales heavily loaded on each factor for all relevant factor matrices resulted in the interpretation of Factors A, B, and C as reflecting Interpersonal Ability, Instrumental Ability, and Propriety, respectively. This study resulted in findings bearing upon three interrelated areas. First, the data suggest that: 1) older and younger adults constitute qualitatively approximately the same class of stimuli, and 2) older and younger adults constitute qualitatively approximately the same population of subjects. That is, perceptions were based on the same underlying dimensions of meaning regardless of age. Second, the data suggest that two major dimensions of social evaluation are Interpersonal Ability and Instrumental Ability. Comparisons of these two attitudinal dimensions with dimensions from other semantic differential studies revealed striking similarity. Third, the finding of stable scales and replicable dimensions suggests the appropriateness of constructing a cross-age semantic differential for social evaluation. Consequently, a 15-scale Cross-Age Semantic Differential for the measurement of social evaluation was proposed. Title: Aging and the Semantic Differential: Semantic Stability in the Measurement of Social Evaluation Author: Petersen, Marilyn Diane Year: 1976 The purpose of this investigation was to assess the validity of utilizing the same semantic differential test as a measure of social evaluation for persons of different ages. The semantic differential, a rating technique by which judgments of stimuli are made on seven-interval bipolar descriptive continua called "scales", currently receives widespread usage as a measure of attitudes toward aging and the elderly. However, a lack of semantic stability across stimuli and across subjects, known, respectively, as "concept-scale" and "subject2 scale" interaction, has been found to occur with the technique in various areas of research. That such a lack of stability might occur across stimuli and/or subjects of different ages is suggested by the existence of . di fferences between people of different ages which affect both the appearance and functioning of the individual. These differences derive from the biological aging process, the life cycle process, and the social change process. This study investigated whether such cross-age differences are of sufficient severity to cause people of different ages to be perceived as different classes of stimuli and/or to perceive others as different populations of subjects. Ratings of eight videotaped stimulus models were made by 60 younger (aged 22 to 32) and 60 older (aged 60 and older ) volunteer subjects on a semantic differential test composed of 38 scales. The stimulus models, consisting of four younger and four older adults, were non-actors, unknown to the rating subjects, and presented for one minute in a standardized visual format and without sound. Of the 38 scales used, seven were selected as reference scales from earlier studies, 30 were suggested by a volunteer "generating" sample of 30 younger and JO older subjects, and one (young/old) was included as a check on the perceived ages of the stimulus models. Scale scores were factor analyzed to establish the underlying factor structure of social evaluation and to ascertain whether it rema1ned stable across stimulus model and subject age levels. Four separate factor analyses were performed -- younger stimulus models/younger subjects, younger stimulus models/older subjects, older stimulus J models/older subjects, and older stimulus models/younger subjects -- permitting comparisons between the factor matrices for concept-scale and subject-scale interaction. Three factors were defined by each of the four separate factor analyses of the scales. Factors A and B were found by two different methods of assessing factor similarity (inspection and coefficients of congruence) to be highly similar across both stimulus model and subject age levels; Factor C (a weakly defined factor) was found to be similar only for the older stimulus models across subject age levels. An examination of the scales heavily loaded on each factor for all relevant factor matrices resulted in the interpretation of Factors A, B, and C as reflecting Interpersonal Ability, Instrumental Ability, and Propriety, respectively. This study resulted in findings bearing upon three interrelated areas. First, the data suggest that: 1) older and younger adults constitute qualitatively approximately the same class of stimuli, and 2) older and younger adults constitute qualitatively approximately the same population of subjects. That is, perceptions were based on the same underlying dimensions of meaning regardless of age. Second, the data suggest that two major dimensions of social evaluation are Interpersonal Ability and Instrumental Ability. Comparisons of these two attitudinal dimensions with dimensions from other semantic differential studies revealed striking similarity. Third, the finding of stable scales and replicable dimensions suggests the appropriateness of constructing a cross-age semantic differential for social evaluation. Consequently, a 15-scale Cross-Age Semantic Differential for the measurement of social evaluation was proposed. Close

• 40. [Article] Age Discrimination: Potential for Adverse Impact and Differential Prediction Related to Age

  The proportion of workers in their 50s, 60s, and 70s is larger than ever before. Current workforce trends indicate global increases in retirement ages and that many individuals are working until later ...

  Citation × Citation Citation Abstract Copy Title: Age Discrimination: Potential for Adverse Impact and Differential Prediction Related to Age Author: Fisher, Gwenith G., Truxillo, Donald M., Finkelstein, Lisa M., Wallace, Lauren E. Year: 2017 The proportion of workers in their 50s, 60s, and 70s is larger than ever before. Current workforce trends indicate global increases in retirement ages and that many individuals are working until later ages than in decades past, and older people are applying for jobs and at later ages. Research to date on age discrimination in selection has focused primarily on disparate treatment or intentional discrimination. However, based on accumulated knowledge about age-related changes in cognitive and physical abilities as well as changes in personality and work motivation across the life course, we suggest that more attention be paid to the possibility of age-based subgroup differences on selection procedures, manifested as adverse impact and differential prediction. We provide recommendations to guide future human resource management research and practice. Title: Age Discrimination: Potential for Adverse Impact and Differential Prediction Related to Age Author: Fisher, Gwenith G., Truxillo, Donald M., Finkelstein, Lisa M., Wallace, Lauren E. Year: 2017 The proportion of workers in their 50s, 60s, and 70s is larger than ever before. Current workforce trends indicate global increases in retirement ages and that many individuals are working until later ages than in decades past, and older people are applying for jobs and at later ages. Research to date on age discrimination in selection has focused primarily on disparate treatment or intentional discrimination. However, based on accumulated knowledge about age-related changes in cognitive and physical abilities as well as changes in personality and work motivation across the life course, we suggest that more attention be paid to the possibility of age-based subgroup differences on selection procedures, manifested as adverse impact and differential prediction. We provide recommendations to guide future human resource management research and practice. Close