The generalized matching law in elite sport competition: football play calling as operant choice

A mathematical model of operant choice, the generalized matching law was used to analyze play-calling data from the 2004 National Football League season. In all analyses, the relative ratio of passing to rushing plays was examined as a function of the relative ratio of reinforcement, defined as yards gained, from passing versus rushing. Different analyses focused on season-aggregate data for the league as a whole, game-by-game data for the league as a whole, and game-by-game data for individual teams. In all analyses except those for a few individual teams, the generalized matching law accounted for a majority of variance in play calling. The typical play-calling pattern reflected undermatching (suggesting imperfect sensitivity of play calling to yardage-gained reinforcers) and a bias for calling rushing plays. Bias was found to be a function of both the relative risk of turnovers and the relative variability in yards gained associated with passing versus rushing plays. The external validity of the matching analyses was supported by significant correlations between parameters of the generalized matching law and team success on offense and season winning percentage. These results illustrate the broad applicability of the generalized matching law to problems outside of the laboratory.     

The effects of sleep disruption on the treatment of a feeding disorder

We evaluated the effects of sleep disruption on the mealtime behavior of a young boy with developmental disabilities. Results showed that bite acceptance was less likely to persist during meals following disrupted sleep, but only when escape extinction was not implemented. Findings are discussed in terms of establishing operations and the effects of sleep disruption on the assessment and treatment of feeding problems.     

Conflict, structure, and absence: André Green on borderline and narcissistic pathology

The authors understand the work of André Green as addressing unresolved and uncharted issues in Freud's views on the earliest phases of development, particularly as those issues concern the evolution of psychic structure, the development of drive components, and the internalization of object representations. The authors describe Green's conceptualization of primitive conflict and its most deleterious result, absence, or the failure to represent the object. These ideas lead to an original way of imagining the analytic setting and to a modification of the classical stance of analyst with patient. Two clinical vignettes are presented.     

Visual Reinforcement Signals Interfere with the Effects of Reinforcer Magnitude Manipulations

Three experiments examined the effect of reinforcement magnitude on free-operant response rates. In Experiment 1, rats that received four food pellets responded faster than rats that received one pellet on a variable ratio 30 schedule. However, when the food hopper was illuminated during reinforcer delivery, there was no difference between the rates of response produced by the two magnitudes of reward. In Experiment 2, there was no difference in response rates emitted by rats receiving either one or four pellets of food as reward on a random interval (RI) 60-s schedule. In Experiment 3, rats responding on an RI 30-s schedule did so at a lower rate with four pellets as reinforcement than with one pellet. This effect was abolished by the illumination of the food hopper during reinforcement delivery. These results indicate that the influence of magnitude is obscured by manipulations which signal the delivery of reinforcement.     

Depressive Symptoms in African-American Women

This project examined the prevalence of depressive symptoms in an African-American female college student sample. Concordance rates between two of the most widely used psychometric instruments in clinical settings, the Minnesota Multiphasic Personality Inventory, revised edition (MMPI-2; Hathway & McKinley, 1967) and the Beck Depression Inventory (BDI; Beck, Ward, Mendelson, Mack, & Erbaugh, 1961), were examined. Results revealed that the MMPI-2 was a more conservative scale than the BDI in identifying depressive symptom levels. Both scales, however, identified 12% to 18% of the sample as experiencing severe symptoms. Results were interpreted in light of the stress model of depression. Participants who experienced many symptoms also had high levels of anxiety and passive coping styles. One significant covariate in this sample was mother's education level. Participants whose mothers had college experience had fewer depressive symptoms than their first-generation college-experience peers. Results were interpreted in light of the possible ways mothers inoculate their daughters from stressful environments because of their experiences and possible ways to use this process to assist first-generation college students.     

Close encounters in the liminal zone: experiments in imaginal communication Part II

The phenomenology of the experience of being in psychic contact with another person was explored in a series of observations using a novel dyadic interaction in imaginal space. Research participants working in pairs with eyes closed received instructions to imagine being in mental contact with one another for three minutes while they observed their internal experiences. Their reports indicated that the imagined contact was experienced as real, as intimate, and aroused the ambivalences usually associated with intimacy as well as phenomena suggestive of projective identification effects. This first part demonstrated that the liminal zone, or the transitional space between individuals, can be experimentally observed through the imagination. Part II of this report will present evidence that the experienced psychic contact was more than 'just imagination', and involved transpersonal interactions, including suggestions of synchronicity and telepathy.     

Perceived Control and Psychological Adjustment in Gay Men With AIDS1

The relationship of control beliefs to psychological adjustment was investigated in a sample of 24 gay men diagnosed with AIDS, participants in the University of California, Los Angeles site of the Multicenter AIDS Cohort Study (MACS). Distinctions between generalized contingency beliefs and specific competence beliefs and between personal and vicarious control beliefs were included in the questionnaire and interview measures administered. The results support these distinctions and indicate that beliefs in personal control over day-to-day symptoms and over course of illness were positively related to adjustment, whereas beliefs in control by others over course of illness and over medical care and treatment were negatively related to adjustment. These relationships appeared to be strongest for men who reported poorer health. These associations were not accounted for by locus of control beliefs, negative affectivity, or time since diagnosis with AIDS.     

Speech perception and the discrimination of brief auditory cues in reading disabled children

The processing of speech and nonspeech sounds by 23 reading disabled children and their age- and sex-matched controls was examined in a task requiring them to identify and report the order of pairs of stimuli. Reading disabled children were impaired in making judgments with very brief tones and with stop consonant syllables at short interstimulus intervals (ISI's). They had no unusual difficulty with vowel stimuli, vowel stimuli in a white noise background, or very brief visual figures. Poor performance on the tones and stop consonants appears to be due to specific difficulty in processing very brief auditory cues. The reading disabled children also showed deficits in the perception of naturally produced words, less sharply defined category boundaries, and a greater reliance on context in making phoneme identifications. The results suggest a perceptual deficit in some reading disabled children, which interferes with the processing of phonological information.