Variations in unconditioned stimulus processing in unblocking

Three experiments examined the mechanisms by which downward shifts in reinforcer value influence learning in appetitive unblocking procedures. The downward shift was accomplished by omitting the 2nd of a 2-reinforcer sequence (food-food or food-sucrose). Performance of normal rats was compared with that of rats with lesions of the central nucleus of the amygdala, which are thought to interfere with surprise-induced enhancements of event processing. The results suggested that, in normal rats, omission of the 2nd reinforcer enhanced processing of the 1st reinforcer rather than processing of the conditioned stimuli and that lesions of the central nucleus eliminated this enhancement. The roles of reinforcement error signals in conditioning are discussed.     

The Impact of Adolescent Deviance on Marital Trajectories

Marriage is a key life event that has numerous benefits. Recent research extends these benefits to include desistance from crime and drug use yet there has been little investigation regarding whether deviant behavior in adolescence impacts long-term marital patterns. Since rates of marriage are low among African Americans and rates of adolescent deviance and crime are high, we investigate the long-term relationship between the two drawing on longitudinal data from the Woodlawn cohort of urban African Americans. This article investigates whether serious adolescent delinquency and marijuana use predict marital trajectories, controlling for known correlates. Multivariate findings indicate that within this African-American population, deviance predicts the probability of marriage, stability of marriage, and timing of marriage for men yet deviance relates solely to the probability of marriage for women.     

The effect of video observation on warmth and competence ratings of individuals with a disability

ObjectivesThis study examined whether a video featuring an adult with a physical disability engaging in either sport, exercise, or an activity of daily living (ADL) can mitigate negative stereotypes of disability held by people without a disability.DesignThis study used a pre-post design, involving three participant groups.MethodsParticipants (n = 212) read a vignette describing an adult with a disability (target). Consistent with the stereotype content model, participants judged the target's warmth and competence. One week later, participants viewed a video of the target participating in sport, exercise, or an ADL and judged the target's warmth and competence.ResultsJudgements of competence but not warmth changed over time. The greatest increases occurred in the sport condition. At follow-up, the typical high warmth low competence stereotype of disability was reversed; the character was judged as being more competent than warm especially in the sport condition.ConclusionVideos of adults with a disability engaging in physical activity, particularly sport, have potential to mitigate negative stereotypes of disability.     

The University of Manchester Longitudinal Study of Cognition in Normal Healthy Old Age, 1983 through 2003

This paper describes the participants, design, method and tests used during a 20-year longitudinal study of cognitive changes in increasing age experienced by 6542 healthy residents of Greater Manchester and Newcastle-upon-Tyne, then aged from 42 to 92 years. Information collected and updated includes demographics and health, scores on two, biennially alternated batteries of cognitive tests, repeated administrations of the Beck and Yesavage depression inventories and of self-reports of stressful life events, self-evaluation and locus of control questionnaires and detailed information on lifestyle, hobbies and occupations, physical and social activities, family circumstances and health history. Records have allowed investigation of rates of cognitive changes from 36 months to 20 years preceding death from a variety of causes. Collection of blood and saliva provide, blood chemistry and cortisol levels to analyse associations of rates of cognitive change to genetic factors, blood chemistry and cortisol levels. A random effects analysis confirms marked effects of drop-out and practice due to repeated testing and shows how true rates of change, and of increases in variability between individuals may be ascertained after these have been identified.     

Talkativeness in Cognitively Normal Women at Genetic Risk for Alzheimer’s Disease

Previous research has suggested a correlation between some linguistic patterns and the risk for Alzheimer’s disease (AD). There is increasing clinical need to identify factors that can be used alone or in combination to predict the onset of AD. The purpose of the present study was to explore the association of language skills and genetic risk for Alzheimer’s disease. Oral and written language samples of cognitively normal women with a susceptibility gene for AD (ApoE e4) were compared to those of noncarriers on measures of grammatical complexity, topic relevance, and talkativeness by observers unaware of participant genotypes. Participants included 29 ApoE e4 carriers 49-73 years of age, and 29 e4 noncarriers 48-76 years of age, most of whom had a first-degree relative with AD. Carriers and noncarriers were group matched for age, educational level, and estimated IQ. Participant groups did not differ significantly in language complexity or topic relevance. However, the ApoE e4 group was significantly more talkative than the noncarrier group (p < .05).     

Experimental manipulation of prior experience: Effects on item and associative recognition

Frequency of exposure to very low- and high-frequency words was manipulated in a three-phase (familiarisation, study, and test) design. During familiarisation, words were presented with their definition (once, four times, or not presented). One week (Experiment 1) or one day (Experiment 2) later, participants studied a list of homogeneous pairs (i.e., pair members were matched on background and familiarisation frequency). Item and associative recognition of high- and very low-frequency words presented in intact, rearranged, old-new, or new-new pairs were tested in Experiment 1. Associative recognition of very low-frequency words was tested in Experiment 2. Results showed that prior familiaris ation improved associative recognition of very low-frequency pairs, but had no effect on high-frequency pairs. The role of meaning in the formation of item-to-item and item-to-context associations and the implications for current models of memory are discussed.     

Encompassing experience: Meanings and methods in health psychology

Abstract

Health psychology is limited by its almost exclusive use of a positivist quantitative research paradigm, and the adoption and use of qualitative methods by health psychologists will provide increased understandings of health and illness. Qualitative methods provide a means to incorporate the social world into our research, and furnish ways to investigate the meanings of health and illness experience. We present a brief consideration of the qualitative paradigm and some important underlying issues related to its use. We describe three qualitative approaches - grounded theory, narrative analysis, and discourse analysis - chosen for their relevance and diversity. We provide illustrations of the use of each in health research, and suggest how these approaches could be utilised by health psychologists to enrich understanding in the health field. We conclude that health psychologists have a great deal to gain from joining other social science health researchers in adopting qualitative approaches in their research.