THE FUNCTIONS OF SELF-INJURIOUS BEHAVIOR: AN EXPERIMENTAL-EPIDEMIOLOGICAL ANALYSIS

Data are summarized from 152 single-subject analyses of the reinforcing functions of self-injurious behavior (SIB). Individuals with developmental disabilities referred for assessment and/or treatment over an 11-year period were exposed to a series of conditions in which the effects of antecedent and consequent events on SIB were examined systematically by way of multielement, reversal, or combined designs. Data were collected during approximately 4,000 experimental sessions (1,000 hr), with the length of assessment for individuals ranging from 8 to 66 sessions (M = 26.2) conducted over 2 to 16.5 hr (M = 6.5). Differential or uniformly high responding was observed in 145 (95.4%) of the cases. Social-negative reinforcement (escape from task demands or other sources of aversive stimulation) accounted for 58 cases, which was the largest proportion of the sample (38.1%). Social-positive reinforcement (either attention or access to food or materials) accounted for 40 (26.3%) of the cases, automatic (sensory) reinforcement accounted for 39 (25.7%), and multiple controlling variables accounted for 8 (5.3%). Seven sets of data (4.6%) showed either cyclical or inconsistent patterns of responding that were uninterpretable. Overall results indicated that functional analysis methodologies are extremely effective in identifying the environmental determinants of SIB on an individual basis and, subsequently, in guiding the process of treatment selection. Furthermore, an accumulation of assessment data from such analyses across a large number of individuals provides perhaps the most rigorous approach to an epidemiological study of behavioral function.     

The measurement of elements in an assembly task-the information output of the human motor system

The performance of three well-practised subjects on an assembly task was analysed using both an electrical contact technique and high-speed film recording. The task consisted of transferring a row of pegs into a parallel row of holes 8 inches away. There were four variations in the diameter of the holes presenting different degrees of difficulty. An information analysis of the output of the motor response, based on a formula suggested by Fitts, was applied to the data. Differences both in the measuring techniques and in the way the information analysis was applied raised problems which have an important bearing on the thesis of the constancy of human channel capacity and on the possible use of information measures in analysing motor tasks. Discrepancies between the photographic and the contact analysis as techniques for defining Movement Loaded and Positioning elements were examined. Whilst the contact analysis showed movement time increasing with decreasing target tolerance the film analysis showed gross movement time to be constant and the variation due to difficulty confined to the relatively small secondary positioning movement. An attempt to analyse the information load on gross and secondary movement respectively indicated that gross movement was made to an area of 2 in. in diameter about the actual target irrespective of its size and that secondary movement began as this target was entered. Values for information transmission rate were found to be constant when based on the individual element times from the photographic analysis but different transmission rates were found when calculations were based on overall times. Finally some assumptions underlying the formula are examined and it is pointed out that other rational assumptions when applied to these data would lead to results which would not support the thesis of the constancy of human channel capacity.     

What do you think about ink? An examination of implicit and explicit attitudes toward tattooed individuals

Tattoos are increasing in popularity, yet minimal research has examined implicit attitudes or the relationship between implicit and explicit attitudes toward tattooed individuals. Seventy-seven online participants (Mage = 36.09, 52% women, 78% white, 26% tattooed) completed measures assessing implicit and explicit attitudes toward tattooed individuals. Results revealed evidence of negative implicit attitudes, which were associated with less perceived warmth, competence, and negative explicit evaluations. However, implicit attitudes were not correlated with measures of disgust or social distance. In addition, age predicted implicit prejudice, but other individual difference measures—such as personal tattoo possession, political identity, and internal/external motivations to respond without prejudice—did not. These findings are discussed in terms of how attitudes toward tattooed individuals may be multifaceted, and research may benefit from measuring implicit and explicit attitudes.     

Examining changes in procedural justice and their influence on problem‐solving court outcomes

The number of problem‐solving courts has grown substantially since the mid‐1990s. Research consistently indicates that participation in these courts lowers recidivism, which is often attributed to defendants’ increased perceptions of procedural justice in these programs. Yet, prior studies are limited in their focus, often examining interactions with the judge in a single court or examining defendant perceptions and outcomes at a single time point. In the present study, we investigate defendant perceptions of procedural justice with judges and case managers across multiple problem‐solving courts over time. Findings indicate that procedural justice varies across court actors and over time. Procedural justice is lower among judges than among case managers; however, changes in perceptions of procedural justice with the judge are associated with improved court outcomes. We suggest that defendant perceptions are variable and complex but important in explaining variations in outcomes.     

The Near-Death Experience: Knowledge and Attitudes of College Students

There is a considerable literature documenting the effects of a near-death experience (NDE) on persons who actually undergo the experience, in terms of their attitudes and opinions about NDEs. However, investigations of how much nonexperiencers know about NDEs and their attitudes towards them are in short supply. This study examined the relationship in people who have not had an NDE between attitudes toward and knowledge of near-death experiences. Subjects were undergraduate students, with a mean age of 32 years. The Near-Death Phenomena Knowledge and Attitudes Questionnaire was employed to assess attitudes toward and knowledge of NDEs. Results indicated that both knowledge and attitudes were relatively normally distributed, and that level of knowledge significantly predicted attitudes towards NDEs, accounting for 34 percent of the common variance.     

When Darwin flopped: The rejection of sexual selection

Charles Darwin considered sexual selection as integral to evolution as natural selection, but the theory of sexual selection was rejected by most scientific and lay audiences. This article argues that sexual selection theory clashed with biases prevalent in the 19th-century—about culture and nature, mind and body, male and female—in ways that Darwin’s first sketch of evolution did not. Whereas the 1859 The Origin of Species tracked the development of bodily structures, the 1871 The Descent of Man, and Selection in Relation to Sex focused not on form but function—on behavior. In Darwin’s view, “mind is function of body,” and the mind was the seat not of reason but of sex. Also, when he postulated that female choice sculpted the male form, he conflicted with the long-standing cultural assumption that men controlled women. And, in discussing female beauty, Darwin showed a fascinating ambivalence about its implications for human gender relations. Finally, he was at odds with his culture in the premium he placed on desire. In short, his theory landed on a cultural fault line, causing upheaval and mayhem, and then it fell into an abyss it had helped to create.     

Left–right ideological differences in system justification following exposure to complementary versus noncomplementary stereotype exemplars

The capacity for victim‐derogating stereotypes and attributions to justify social inequality and maintain the status quo is well known among social scientists and other observers. Research conducted from the perspective of system justification theory suggests that an alternative to derogation is to justify inequality through the use of complementary stereotypes that ascribe compensating benefits and burdens to disadvantaged and advantaged groups, respectively. In two experimental studies conducted in Poland we investigated the hypothesis that preferences for these two routes to system justification would depend upon one's political orientation. That is, we predicted that the system‐justifying potential of complementary versus noncomplementary stereotype exemplars would be moderated by individual differences in left–right ideology, such that left‐wingers would exhibit stronger support for the societal status quo following exposure to complementary (e.g., “poor but happy,” “rich but miserable”) representations, whereas right‐wingers would exhibit stronger support for the status quo following exposure to noncomplementary (e.g., “poor and dishonest,” “rich and honest”) representations. Results were supportive of these predictions. Implications for theory and practice concerning stereotyping, ideology, and system justification are discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

“Watch out!”: Effects of instructed threat and avoidance on human free‐operant approach–avoidance behavior

Approach–avoidance paradigms create a competition between appetitive and aversive contingencies and are widely used in nonhuman research on anxiety. Here, we examined how instructions about threat and avoidance impact control by competing contingencies over human approach–avoidance behavior. Additionally, Experiment 1 examined the effects of threat magnitude (money loss amount) and avoidance cost (fixed ratio requirements), whereas Experiment 2 examined the effects of threat information (available, unavailable and inaccurate) on approach–avoidance. During the task, approach responding was modeled by reinforcing responding with money on a FR schedule. By performing an observing response, participants produced an escalating “threat meter”. Instructions stated that the threat meter levels displayed the current probability of losing money, when in fact loss only occurred when the level reached the maximum. Instructions also stated pressing an avoidance button lowered the threat level. Overall, instructions produced cycles of approach and avoidance responding with transitions from approach to avoidance when threat was high and transitions back to approach after avoidance reduced threat. Experiment 1 revealed increasing avoidance cost, but not threat magnitude, shifted approach–avoidance transitions to higher threat levels and increased anxiety ratings, but did not influence the frequency of approach–avoidance cycles. Experiment 2 revealed when threat level information was available or absent earnings were high, but earnings decreased when inaccurate threat information was incompatible with contingencies. Our findings build on prior nonhuman and human approach–avoidance research by highlighting how instructed threat and avoidance can impact human AA behavior and self‐reported anxiety.     

The Politics of Trauma Studies: What Can We Learn From Women Combatants' Experiences of Traumatic Events in Conflict Zones?

Wars, combat, and political developments triggered the study of trauma. Knowledge about trauma initially emerged from the experiences of men combatants in the battlefield. At a later stage, the study of trauma focused on women and children subject to violence and abuse. The current research suggests that additional aspects of trauma can be understood through the study of competent women exposed to traumatic events and not merely as victims of war or abuse. The study offers an analysis of women combatants' narratives of their exposure to traumatic events in conflict zones. Data were obtained from two focus groups and a series of 30 personal interviews of women veterans who served in the IDF. Interviewing women combat soldiers revealed a variety of narratives of their war experiences, including the intertwining of the emotional and the physical. The window to understanding the trauma was opened by analysis of the responses of the women combatants to potentially traumatic events rather than by focusing on post‐traumatic stress disorder (PTSD) per se. We emphasize the need for a critical perspective in the study of trauma and combat trauma and propose that there is value in engaging with and listening to diverse narratives of trauma.