Effects of inbreeding on mental-ability factors

The differential effects of inbreeding on 11 subtests of the WISC, in a Japanese (Hiroshima) population, are related to the factor structure of the tests. The degree of inbreeding depression on mental abilities is most strongly correlated with the subtests' loadings on the General factor, g, which is common to all of the subtests. Loadings on the Verbal factor are also positively correlated with inbreeding depression. The (non-verbal) Performance factor, however, is slightly enhanced by inbreeding. One possible inference from these findings is that at least the General factor shows genetic dominance, which is theoretically consistent with natural selection for g in the course of human evolution. It is also noted that the factor structure of the WISC in the Japanese population is highly similar to that of the U.S. standardization sample.     

Serial rote-learning: Incremental or all-or-none?

If the associative connections in a serial list are acquired in an all-or-none fashion, rather than gradually with every trial adding an increment of associative strength, then changing the serial order of the middle items in the list during the course of practice should have no effect on the rate of learning the list as a whole or even of the particular items that have been interchanged. Thirty subjects learned a serial list by the anticipation method. The middle items of the list were reversed in serial order approximately half-way through the number of trials required for mastery. The subjects took no longer to learn the list and made no more errors than did 30 control subjects for whom there was no change in serial order. The serial-position curves of the two groups were almost identical. It was also shown that the learning “curves” of single items in the series, when plotted for individual subjects do not reveal a gradually increasing probability of the correct response, but show instead a sudden jump on one trial from the chance guessing level to a level close to 100 per cent, correct responses. The results are consistent with a non-incremental theory of serial learning.     

Stimulus aspects of aversive controls: the retention of conditioned suppression

Three years ago a tone ending in unavoidable electrical shock was periodically presented to pigeons while they pecked a key for food. When pecking was disrupted by tone, shock was disconnected and the training tone as well as tones of different frequencies were presented. At first, all tones caused a reduction in the rate of pecking, but as testing proceeded, suppression began to extinguish and the gradient narrowed. In the present work, testing was resumed after a 2½-yr interruption. Analysis of the gradients obtained just before and just after the interruption yielded no evidence of changes with the passage of time. As testing proceeded, however, extinction of suppression continued and the gradient all but disappeared. In subsequent experiments with these subjects (Ss) it was found that the presentation of free shocks caused a reappearance of the gradient and that this effect persisted in reduced amount for several sessions after the shock condition was terminated.     

Sensation seeking, aggressiveness, and adolescent reckless behavior

Sensation seeking and aggressiveness were hypothesized to contribute to the developmental basis of reckless behavior in adolescence. This hypothesis was investigated in two studies, one on high school students and the other on college students. Sensation seeking was found to be related to every type of reckless behavior, including five types of automobile driving, sex without contraception, sex with someone known only casually, number of sexual partners, alcohol and drug use, vandalism, and theft. Aggressiveness was related to several of the driving variables, as well as to vandalism and theft. For every type of reckless behavior, frequencies of reckless behavior were as high or higher for the college students than for the high school students. Findings are discussed in relation to socialization in the culture of the American middle-class.     

Anxiety as a Predictor and Outcome Variable in the Multimodal Treatment Study of Children with ADHD (MTA)

Initial moderator analyses in the Multimodal Treatment Study of Children with ADHD (MTA) suggested that child anxiety ascertained by parent report on the Diagnostic Interview Schedule for Children 2.3 (DISC Anxiety) differentially moderated the outcome of treatment. Left unanswered were questions regarding the nature of DISC Anxiety, the impact of comorbid conduct problems on the moderating effect of DISC Anxiety, and the clinical significance of DISC Anxiety as a moderator of treatment outcome. Thirty-three percent of MTA subjects met DSM-III-R criteria for an anxiety disorder excluding simple phobias. Of these, two-thirds also met DSM-III-R criteria for comorbid oppositional-defiant or conduct disorder whereas one-third did not, yielding an odds ratio of approximately two for DISC Anxiety, given conduct problems. In this context, exploratory analyses of baseline data suggest that DISC Anxiety may reflect parental attributions regarding child negative affectivity and associated behavior problems (unlike fearfulness), particularly in the area of social interactions, another core component of anxiety that is more typically associated with phobic symptoms. Analyses using hierarchical linear modeling (HLM) indicate that the moderating effect of DISC Anxiety continues to favor the inclusion of psychosocial treatment for anxious ADHD children irrespective of the presence or absence of comorbid conduct problems. This effect, which is clinically meaningful, is confined primarily to parent-reported outcomes involving disruptive behavior, internalizing symptoms, and inattention; and is generally stronger for combined than unimodal treatment. Contravening earlier studies, no adverse effect of anxiety on medication response for core ADHD or other outcomes in anxious or nonanxious ADHD children was demonstrated. When treating ADHD, it is important to search for comorbid anxiety and negative affectivity and to adjust treatment strategies accordingly.     

A two wave cross‐lagged study of work‐role conflict,work‐family conflict and emotional exhaustion

By using a two‐wave panel design, the present study aimed to study causal, reversed, and reciprocal relations among work‐role conflict, work‐family conflict, and emotional exhaustion. The Conservation of Resources theory was applied as a theoretical framework. The study was conducted in a large Norwegian oil and gas company (n = 1703). The results demonstrated positive cross‐lagged effects of work‐role conflict and work‐family conflict on emotional exhaustion. In addition, emotional exhaustion predicted work‐family conflict over time, and work‐family conflict predicted work‐role conflict over time, indicating the presence of reciprocal effects. The current study adds new knowledge to the positioning of work‐family conflict in relation to perceived conflict in the workplace and emotional exhaustion.     

Evaluating the Utility of MFT Models in the Treatment of Trauma: Implications for Affect Regulation

The purpose of this paper is to discuss polyvagal theory as a theoretical foundation for helping clinicians more effectively treat clients who have experienced major trauma. More specifically, we emphasize that through the use of both modern and post-modern models, marriage and family therapists may use emotion regulation strategies to assist clients in overcoming the negative repercussions of traumatic events. We suggest that the nature of emotional arousal which accompanies trauma alters the physical process by which the body regulates future affective stimuli in ways that are potentially detrimental to human relationships. We then offer a discussion of how a selection of MFT models contain strategies that promote reconnection to self and others that should be utilized with greater precision, ultimately to target the physiological symptoms of trauma-altered emotion regulation processes. Finally, we discuss the need for more specific, process-oriented research that integrates cross-disciplinary theory to contribute to a more intricate and useful understanding of the treatment of trauma in the relational context.     

Gender Integration in the Military: A Rawlsian Approach

Following the recent decisions by Western militaries to pursue greater integration of women into combat roles, this paper examines the principles that motivate integration and organizes them into a theoretically coherent scheme that could serve as a roadmap for policymakers as they rebuild military institutions and their combat units in an integrated fashion. The strategy of the paper is Rawlsian: the right relationship between the principles that motivate integration can be derived through an application of Rawls's methodology as described in A Theory of Justice. The result is a lexically ordered set of principles that begin with gender‐blind equal opportunity but permit adjustments that take gender into account when these adjustments serve the interests of military institutions. The paper concludes with a discussion of two concerns, one practical and one theoretical, that one might have about the account.