Response strength in extreme multiple schedules

Four pigeons were trained in a series of two-component multiple schedules. Reinforcers were scheduled with random-interval schedules. The ratio of arranged reinforcer rates in the two components was varied over 4 log units, a much wider range than previously studied. When performance appeared stable, prefeeding tests were conducted to assess resistance to change. Contrary to the generalized matching law, logarithms of response ratios in the two components were not a linear function of log reinforcer ratios, implying a failure of parameter invariance. Over a 2 log unit range, the function appeared linear and indicated undermatching, but in conditions with more extreme reinforcer ratios, approximate matching was observed. A model suggested by McLean (1991), originally for local contrast, predicts these changes in sensitivity to reinforcer ratios somewhat better than models by Herrnstein (1970) and by Williams and Wixted (1986). Prefeeding tests of resistance to change were conducted at each reinforcer ratio, and relative resistance to change was also a nonlinear function of log reinforcer ratios, again contrary to conclusions from previous work. Instead, the function suggests that resistance to change in a component may be determined partly by the rate of reinforcement and partly by the ratio of reinforcers to responses.     

Implicit Attitudes Toward Arab-Muslims and the Moderating Effects of Social Information

Three studies examined the relative valence and strength of implicit attitudes toward Arab-Muslims using the Implicit Association Test (IAT) while exploring the moderation of such implicit effects. Studies have suggested that repeated exposure to information associating members of a social group (e.g., Arab-Muslims) with evaluative attributes (e.g., terrorism) might create automatic attitudes toward them. Consistent with this notion, the IAT results indicated strong implicit preference for White over Arab-Muslim, whereas the magnitude of such a bias was substantially diminished when assessed by explicit measures (Study 1). It is also interesting to note that participants exhibited implicit preference for Black over Arab-Muslim when measured by the IAT, whereas no difference was found between the 2 groups in stimulus familiarity and in explicit attitudes (Studies 2 and 3). However, such implicit effects were moderated when participants were exposed to positive information about Arab-Muslims (Study 3). Theoretical and practical implications of these findings are further discussed.     

I Knew It All Along,Unless I Had to Work to Learn What I Know

After receiving knowledge regarding some topic, people usually overestimate their prior topic knowledge. Two experiments investigated whether people would claim less prior knowledge if they worked to earn their present knowledge. In Study 1, students finishing a psychology course claimed less precourse psychology knowledge if they reported devoting more effort toward the course. In Study 2, the knew-it-all-along effect was stronger for participants who were simply given the answers to questions than for participants who studied for 20 minutes to learn the answers. Both cognitive and motivational factors can account for the observed effects of effort investment on retrospective knowledge judgments.     

Parent–child interaction therapy (PCIT) in young children with autism spectrum disorder

Abstract

Parent–child interaction therapy (PCIT) is an evidence-based treatment for typically developing children with disruptive behavior. We conducted a randomized-controlled trial of PCIT versus wait-list control (WLC) with 23 children with ASD (3–7?years) and disruptive behavior. Over 16 treatment sessions, PCIT significantly predicted reductions in disruptive behavior over WLC and explained a significant variation in scores on the ECBI Intensity subscale. Additionally, parent skills improved significantly compared to WLC. However, no statistically significant group differences were found on child compliance rates, autism severity, or parental stress. Results support PCIT as an evidence-based treatment for disruptive behavior in ASD.

• Highlights

• Parent skills were significantly improved for those receiving PCIT

• Intensity of disruptive behaviors decreased significantly for those receiving PCIT

• Parental stress and autism severity did not significantly decrease with PCIT

     

Childhood attachment to parents and frequency of prayer during the college years

This study examines the association between childhood attachment with parents and the frequency of prayer among people raised in Mormon families. Three types of attachment with fathers and mothers – secure, anxious, and avoidant – were measured on a Likert scale. Undergraduate students at a state university in Utah completed questionnaires that included measurements of childhood attachment with parents and frequency of prayer. According to bivariate correlations, frequency of prayer was related to the nature of childhood attachment to parents; according to multiple regression analyses, the correlation between frequency of prayer and childhood attachment was largely, but not entirely, accounted for by other factors involving general frequency of religious activity; finally, these results differed somewhat between men and women. Men who had an avoidant relationship with their mother in childhood prayed less often when they were in college, while for women this association was not statistically significant.     

Characteristics of congregations that might increase their participants’ risk of depression

This research examines some characteristics of congregations that might increase the risk of their participants being depressed. Analysing data from the Portraits of American Life Study Wave 1 (2006), this research found that those affiliated with a congregation that did not meet their spiritual needs had arguments about traditional versus contemporary beliefs, made them feel like outsiders, and had unsatisfactory decision-making processes which were more likely to feel depressed than their counterparts. The findings of this research suggest that to alleviate the problem of depression, individuals need to choose a congregation that meets their spiritual needs and makes them feel accepted, rather than just attending any congregations.     

Factor Structure of Patient and Caregiver Ratings on the Dementia Quality of Life Instrument

ABSTRACT

Preliminary evidence suggests that quality of life reports from patients diagnosed with mild cognitive impairment (MCI) and mild Alzheimer's disease (AD) are as reliable and valid as data provided by caregivers. To date, no studies compared the factor structure of data provided by caregivers and patients. Factor analyses are important to conduct because they are an indicator of validity. This study compared the factor structure of patient and caregiver reports on the Dementia Quality of Life scale (DQoL). Participants (N?=?67) were patients diagnosed with amnestic MCI or mild AD and their caregivers. Principal axis factor analyses were run separately on patient and caregiver report data. The three-factor solutions for patient and caregiver data were nearly identical. Three factors corresponding to positive affect, negative affect, and aesthetics emerged reliably from analyses. Thus, data from patients demonstrated a factor structure that was highly consistent with caregiver report data and conformed to meaningful psychological constructs.     

Age-Related Differences in Strategy Knowledge Updating: Blocked Testing Produces Greater Improvements in Metacognitive Accuracy for Younger than Older Adults

ABSTRACT

Age-related differences in updating knowledge about strategy effectiveness after task experience have not been consistently found, perhaps because the magnitude of observed knowledge updating has been rather meager for both age groups. We examined whether creating homogeneous blocks of recall tests based on two strategies used at encoding (imagery and repetition) would enhance people's learning about strategy effects on recall. Younger and older adults demonstrated greater knowledge updating (as measured by questionnaire ratings of strategy effectiveness and by global judgments of performance) with blocked (versus random) testing. The benefit of blocked testing for absolute accuracy of global predictions was smaller for older than younger adults. However, individual differences in correlations of strategy effectiveness ratings and postdictions showed similar upgrades for both age groups. Older adults learn about imagery's superior effectiveness but do not accurately estimate the magnitude of its benefit, even after blocked testing.     

The military chaplain: a study in ambiguity

This article looks at the ambiguities in the role of the military chaplain from three points of view. The first considers the nature of the constituency within which the chaplain ministers, paying particular attention to the degree – or otherwise – of secularisation and the reasons for this. The second examines the role of the chaplain in relation to the two institutions which he or she serves (i.e. church and state) and the tensions that emerge as a result. These are articulated in terms of ‘an angle of eschatological tension’. The third is concerned with ‘the roles within the role’ – that is the variety of tasks that make up the role of chaplaincy and the degree to which these are compatible with each other. The significance of theology in the resolution of the ensuing issues is set against diminishing societal resources in terms of religious literacy.