Maximum likelihood estimates of item parameters using the logistic function

The logistic function is proposed as an alternative to the integrated normal function when estimating parameters of test items. The logistic curve is described; an iterative method for finding maximum likelihood estimates of its parameters is given, and an example of its use is presented.     

A sociological view of delinquency and implications for the ministry

Conclusions With respect to the problem of delinquency, we have presented a sociological view of causation, i.e.,we have implicitly suggested that the attempt to control delinquency by dealing with the individual must be balanced by dealing with the conditions in our society which breed alienation and crime. Massive changes are needed in our society at the present time if future problems traceable to alienation and apathy are to be averted. The changes, we believe, are possible if enough people are brought to the point of concern. We do not think we should attempt to be too specific about the changes needed.In general, however, we suggest that ministers must get out of their own churches or parishes and find out what is going on in the surrounding neighborhoods, especially those which are facing problems of poverty, of delinquency, and of ethnic discrimination. It will not do for them to wait until a dramatic event occurs at home before they begin to move. In this regard, we think ministers should make every effort tojoin and/or form pressure and action groups which work to bring about social action at the point of need.     

Selective punishment of interresponse times: The roles of shock intensity and scheduling

Two experiments investigated the roles of shock intensity and scheduling in selective punishment of interresponse times. In each experiment the punishment contingencies were imposed on a background of rats' responding maintained by a variable-interval schedule of food presentation. In Experiment 1 all interresponse times greater than 8 seconds produced shock. In Experiment 2 all interresponse times greater than 8 seconds but less than 12 seconds produced shock. In each experiment shock intensity was initially 0.3 milliamperes (mA) and then was varied through an ascending sequence ranging from 0.1 mA to 0.4 mA, in 0.1-mA increments. Experiment 1 produced response-rate increases at low intensities (0.1 and 0.2 mA) but eliminated responding at the remaining intensities. Experiment 2 produced response-rate increases only with 0.1-mA shock, although responding was maintained at all shock parameters investigated. Analysis of the interresponse times per opportunity showed differential suppression of the targeted responses in all cases except the high-intensity shock phases of Experiment 1. The current data support and extend previous studies of selective interresponse-time-dependent shock schedules but suggest that response-rate increases are not a necessary outcome of this type of procedure. The view that variable-interval schedules of shock presentation selectively target long interresponse times was also supported.     

On multiple determinants of racial differences in intelligence: A reply to Jensen

A belief in the multidimensional nature of intelligence prompted Borkowski and Krause (1983) to reexamine the race-IQ controversy from a new theoretical perspective. Jensen has subsequently forced us to look more carefully at data presented in the earlier paper. After we corrected all measures in the perceptual efficiency and executive systems for unreliability and rethought the earlier data, our original conclusions remain tenable: Control processes and metacognitive states are important factors in understanding the sources of race-related differences in intelligence. In accord with the earlier conclusion, we do not deny the association of “speediness” (perceptual efficiency) with race-IQ differences but rather argue for the necessity, and utility, of a broader, multidimensional conceptualization of the nature and growth of intelligence.     

Development and initial validation of the Adolescent Responses to Body Dissatisfaction Measure

One community sample (N = 607) of youths generated self-reported responses to body dissatisfaction, from which the Adolescent Responses to Body Dissatisfaction (ARBD) inventory was constructed. A 2nd, similar sample (N = 830) completed this measure as well as measures of coping, body dissatisfaction, body mass index, depressive symptoms, and disordered eating behaviors. Evidence of 6 ARBD factors emerged: Self-Acceptance, Compensatory Thinking, Diet/Exercise, Anxious Responding, Appearance Strategies, and Social Comparison. Subscales based on these factors provided evidence of convergent, discriminant, construct, and incremental validity. Sex and ethnic differences were also evident. Adolescents' use of Self-Acceptance and Compensatory Thinking strategies appeared to attenuate the relation between body dissatisfaction and psychopathology, whereas use of Diet/Exercise and Anxious Responding appeared to exacerbate this relation, especially in adolescents who were not overweight. The ARBD provides a window into potentially healthy and unhealthy ways in which adolescents cope with body dissatisfaction. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

A self-referential default brain state: patterns of coherence,power, and eLORETA sources during eyes-closed rest and Transcendental Meditation practice

Activation of a default mode network (DMN) including frontal and parietal midline structures varies with cognitive load, being more active during low-load tasks and less active during high-load tasks requiring executive control. Meditation practices entail various degrees of cognitive control. Thus, DMN activation patterns could give insight into the nature of meditation practices. This 10-week random assignment study compared theta2, alpha1, alpha2, beta1, beta2 and gamma EEG coherence, power, and eLORETA cortical sources during eyes-closed rest and Transcendental Meditation (TM) practice in 38 male and female college students, average age 23.7 years. Significant brainwave differences were seen between groups. Compared to eyes-closed rest, TM practice led to higher alpha1 frontal log-power, and lower beta1 and gamma frontal and parietal log-power; higher frontal and parietal alpha1 interhemispheric coherence and higher frontal and frontal-central beta2 intrahemispheric coherence. eLORETA analysis identified sources of alpha1 activity in midline cortical regions that overlapped with the DMN. Greater activation in areas that overlap the DMN during TM practice suggests that meditation practice may lead to a foundational or ‘ground’ state of cerebral functioning that may underlie eyes-closed rest and more focused cognitive processes.     

Unequally masked: Indexing differences in the perceptual salience of "unseen" facial expressions

Two experiments investigated the degree to which different facial expressions, when backwardly masked by neutral faces, are blocked from different levels of perceptual access as indexed by explicit (self-reported) awareness, forced-identification performance, and stimulus sensitivity in a signal detection paradigm. Results indicate that a 16.67 ms target-mask stimulus onset asynchrony (SOA) is insufficient to reliably block either the simple detection or the forced-identification of backwardly masked expressions. This finding holds even for participants who deny possessing any explicit awareness of the masked images whatsoever. Furthermore, "unseen" happy faces are less effectively masked by neutral expressions than are unseen angry or neutral faces, an observation that might also extend to other affective expressions (e.g., fear). These results expand upon previous findings (Esteves & Öhman, 1993) and provide new information about the multitude of factors that may be operating in research that involves backwardly masked facial expressions.     

Representation and the Intrapsychic: Cartesian Barriers to Empathic Contact

This paper argues for a radical relational perspective that explicitly challenges the notion of the intrapsychic and the related Cartesian assumptions of representationalism. Conceptual tools derived from the school of embodied cognition provide an alternative theoretical language that depicts a new understanding of experience as an emergent and distributed phenomenon of a dialogic communicative system. Clinical vignettes illustrate how this new ontology of experience promotes a therapeutic ambience that dissolves the barriers to empathic contact imposed by the retention of representational modes of thought.