Lifespan development of stimulus-response conflict cost: similarities and differences between maturation and senescence

Age gradient of the mechanism of stimulus-response conflict cost was investigated in a population-based representative sample of 291 individuals, covering the age range from 6 to 89 years. Stimulus-response conflict cost, indicated by the amount of additional processing time required when there is a conflict between stimulus and response options, follows a U-shaped function across the lifespan. Lifespan age gradient of conflict cost parallels closely those of processing fluctuation and fluid intelligence. Individuals at both ends of the lifespan displayed a greater amount of processing fluctuation and at the same time a larger amount of conflict cost and a lower level of fluid intelligence. After controlling for chronological age and baseline processing speed, conflict cost continues to correlate significantly with fluid intelligence in adulthood and old age and with processing fluctuation in old age. The relation between processing fluctuation and conflict cost in old age lends further support for the neuromodulation of neuronal noise theory of cognitive aging as well as for theories of dopaminergic modulation of conflict monitoring.     

Distributive Justice for Others,Collective Angst,and Support for Exclusion of Immigrants

Harsh treatment of others can reflect an underlying motivation to view the world as fair and just and also a dispositional tendency to believe in justice. However, there is a critical need to refine and expand existing knowledge, not only to identify underlying psychological processes but also to better understand how justice may be implicated in support for exclusionary policies. Across two studies, we show that support for policies that restrict immigrants is exclusively associated with thoughts about fair outcomes for other people (distributive justice for others). In Study 1, Americans' dispositional tendency to believe in distributive justice for others was associated with greater support for a policy proposing to further restrict immigrant job seekers' capacity to gain employment in the United States. In Study 2, we experimentally primed thoughts about justice in a sample of U.S. police officers. Support for a policy that mandated stricter policing of illegal immigration was strongest among officers who first thought about fair outcomes for other people, relative to other unique justice primes. Across both studies, distributive justice for others was associated with greater collective angst—perceived threat towards the future existence of Americans. Moreover, collective angst mediated the link between distributive justice for others and support for restrictive policies. Overall, this research suggests that thoughts about distributive justice for others can especially diminish compassion towards immigrants and other underprivileged groups via support for exclusionary policies. In addition, merely thinking about distributive justice for others may be sufficient to amplify social callousness.     

ASSESSMENT OF STEREOTYPIC AND SELF-INJURIOUS BEHAVIOR AS ADJUNCTIVE RESPONSES

Certain responses of both humans and nonhumans appear to be maintained indirectly by intermittent reinforcement schedules and have been referred to collectively as adjunctive behavior. Although basic research has examined adjunctive behavior extensively, relatively few studies have been conducted with humans, particularly those with developmental disabilities who often engage in frequent and varied stereotypic behavior. This study assessed possible adjunctive characteristics of self-injurious and stereotypic behaviors using a multielement design containing two types of control conditions. Four subjects who engaged in both self-injurious behavior and stereotypy participated after variables maintaining their self-injury were identified via functional analyses. Each day, subjects were exposed to three 15-min sessions in random order: (a) noncontingent presentation of food on a fixed-time schedule (e.g., FT 30 s), (b) a massed-reinforcement (food) control, and (c) a no-reinforcement control. A variety of fixed-time schedules were examined during different experimental phases. Results of this preliminary study suggested that self-injury was not induced by intermittent reinforcement schedules, whereas the stereotypic behavior of some individuals showed characteristics of adjunctive behavior. The importance of research on adjunctive behavior and suggestions for future studies are discussed.     

TRANSFER OF BEHAVIORAL FUNCTION AS A CONTRIBUTING FACTOR IN TREATMENT RELAPSE

When relapse occurs following successful treatment to reduce problem behavior, it is often attributed to inconsistent implementation of maintenance programs. Although less likely, another potential cause for relapse is a change in the behavior's maintaining contingency over time. To examine this possibility, additional assessment was conducted with 4 individuals who were rereferred to a day-treatment program due to recurrence of their self-injurious behavior (SIB) 2 months to 2 years following successful treatment. In each case, the original treatment had been developed and implemented based on the outcome of functional analysis assessments. For 1 subject, results of a second functional analysis were consistent with those from the original assessment, indicating that the function of her SIB had remained unchanged. For the other 3 subjects, results of the second assessment suggested that their SIB had acquired new or additional functions. These findings indicate that factors other than program inconsistency can lead to relapse, and that clinical revaluation for such cases should include a current functional analysis to determine if new treatment components are needed.     

EFFECTS OF REINFORCEMENT CHOICE ON TASK RESPONDING IN INDIVIDUALS WITH DEVELOPMENTAL DISABILITIES

The effects of reinforcement choice on task performance were examined with 6 individuals who had been diagnosed with severe to profound mental retardation. Five highly preferred items were identified for each participant via stimulus preference assessments. Participants then were exposed to choice and no-choice conditions that were alternated within reversal and multielement designs. During choice sessions, participants were permitted to select between two preferred stimuli contingent on responding. During no-choice sessions, the therapist delivered a single item contingent on responding. Preference for the stimuli was held constant across conditions by yoking the items delivered during no-choice sessions to those selected during the immediately preceding choice sessions. All participants exhibited similar rates of responding across choice and no-choice conditions. These findings indicate that for individuals with severe disabilities, access to choice may not improve task performance when highly preferred items are already incorporated into instructional programs.     

Differences in mental representations spontaneously adopted for reasoning

Retrospective reporting was used to show that people spontaneously adopt different mental representations for reasoning. In two experiments, subjects solved a large number of threeterm series reasoning problems and then gave retrospective reports (verbal protocols, drawings, and forced-choice strategy selections) about their solutions. A majority of subjects’ reports could be classified reliably into two groups. One group (abstract directional thinkers) claimed to construct a mental ordering of the three geometric figures used as the terms in the problems. A second group (concrete properties thinkers) claimed to attribute physical properties to mental geometric objects. In both experiments, abstract directional thinkers made few errors and were sensitive to the number of pivot-first premises in a problem. Concrete properties thinkers made more errors and were sensitive to the use of inverse relations and the number of alternations between a relation and its inverse as a problem was read. Quantitative models of the two kinds of reasoning are presented. Implications are discussed concerning theories of reasoning, tests of reasoning, and the usefulness of retrospective reporting as a general method.     

An investigation of verbal interaction, knowledge of sexual behavior and self-concept in adolescent mothers

Variables commonly considered to be major factors in contributing to the incidence of adolescent pregnancy may be only part of the total pattern. This study sought to examine the adolescent mothers' communication with significant others and their knowledge about sex, pregnancy, and birth control methods. Self-concepts of the adolescent mothers were compared with those of the published norms of the Tennessee Self-Concept Scale. The study included 23 adolescent mothers between the ages of 13 and 19 who were gravida 1 as indicated by their medical records. They were given a questionnaire constructed from previous research. They also completed a communication scale and the Tennessee Self-Concept Scale. The findings of the present study indicated that most adolescent mothers considered their communication with their parent mothers to be one of mutual understanding. However, it appears that most adolescent mothers obtain much of their information about sex, pregnancy, and birth control methods from significant others. The self-concepts of these adolescent mothers were lower in comparison to the norm. The results indicate a need for further research in the area of adolescent sexual development, sex education in the school, and increased involvement of parents in the communication of sexual mores.     

Comparison of student and recruiter values

Value priorities of campus employment recruiters and senior liberal arts students were compared using Rokeach's Value Survey. Three hypotheses were confirmed: (1) Significant differences were found between groups' rankings of values. Students ranked idealistic values high, while recruiters ranked values applicable to business near the top. (2) A greater number of significant differences were found among instrumental values than among terminal values. (3) Regardless of the sex of the applicants, recruiters chose applicants expressing masculine rather than feminine values.     

Integrating situational and dispositional determinants of job satisfaction: findings from three samples of professionals

Job satisfaction can be conceptualized as a function of situational conditions, personal characteristics, and interactions between both groups of variables. The authors compared the relative predictive power of these determinants in 3 samples of professionals (total N = 1,065). Perceived job characteristics (qualification possibilities, social support, stress, autonomy, participatory leadership) uniquely explained 7-22% of the variance in job satisfaction, and dispositional factors (Big Five, occupational self-efficacy, work centrality, mastery goals) uniquely explained 8-12% of the variance. Dispositional influences were partially mediated by perceived job characteristics. Interactions between situational and dispositional factors were of little significance. The authors concluded that perceived job characteristics (especially autonomy and participatory leadership) are important determinants of job satisfaction, and neuroticism is an important determinant as well. Highly educated professionals' job satisfaction also seems to be driven by qualification possibilities.