An experimental evaluation of tic suppression and the tic rebound effect

Tourette's syndrome (TS) is a neurobiological disorder consisting of motor and vocal tics that are thought to be temporarily suppressible. Many professionals, however, believe that a paradoxical increase in tic frequency (above baseline levels) occurs when efforts to suppress have ceased (i.e., a rebound effect). To date, little research has investigated tic suppression or its effects. This study examined tic frequency during baseline, suppression, and post-suppression conditions using an experimental preparation reported to reliably produce tic suppression in children. Six children with TS and one with chronic tic disorder (CTD) were recorded during baseline and repeated suppression and post-suppression conditions. Tic frequency was significantly lower during suppression as compared to baseline. Although tic frequency during post-suppression was higher than during suppression, it was lower than baseline levels, arguing against a "rebound" effect of tic suppression. Exploratory analyses revealed that scores on the attention problems subscale of the Child Behavior Checklist significantly predicted tic suppressibility. The relationships between age, tic severity, and tic suppressibility were also explored.     

Acquisition of cocaine self-administration with unsignaled delayed reinforcement in rhesus monkeys

Six experimentally naive rhesus monkeys produced 0.01 mg/kg/infusion cocaine by lever pressing under a tandem fixed-ratio 1 differential-reinforcement-of-other-behavior schedule. One lever press initiated an unsignaled 15- or 30-s delay culminating in cocaine delivery. Each press made during the delay reset the delay interval. With two exceptions, responding was acquired and maintained at higher rates than responding on a second (inoperative) lever. For the exceptions, a cancellation contingency was arranged in which each formerly inoperative-lever response reset the tandem schedule. This manipulation reduced presses on the inoperative lever. Subsequently, the consequences of responding on the two levers were reversed, and the monkeys again responded at higher rates on the operative lever. As a comparison, 3 additional experimentally naive monkeys received response-independent cocaine deliveries. Although lever pressing was observed, it extinguished and was subsequently reestablished under the tandem schedule. The results suggest that although response-reinforcer contiguity is not required for cocaine to acquire reinforcing functions, a response-reinforcer relation appears necessary.     

Test-retest reliability of component process variables within the Hopkins Verbal Learning Test-Revised

Emerging data support the construct validity of component process variables of learning and memory within the Hopkins Verbal Learning Test-Revised (HVLT-R; Brandt & Benedict, 2001); however, the test-retest reliabilities of such measures are heretofore largely unknown. This study reveals generally modest-to-low 1-year test-retest stability for several key HVLT-R component process variables (e.g., semantic clustering) in 41 healthy, younger adults. These findings are discussed in relation to issues of clinical practice and research design in neuropsychological assessment.     

From dissonant dominance to synchronic sanctity: Relational extraction as counter-resonance to extractivism

There is a growing tendency within various disciplines of the humanities to conflate the terms extraction and extractivism. While the first word has many everyday uses—tooth extraction, vanilla “extract”—the latter term was specifically coined to identify a malevolent imaginary that indemnifies the removal of so-called “resources,” especially when that displacement involves layers of violence and/or looks solely to satisfy a particular economic aim. Given these disparate denotations, the unqualified use of “extraction” synonymously with “extractivism” introduces unnecessary ambiguity, inviting divergent arguments that ultimately diminish an otherwise worthy discussion and losing sight of the grave issues that underlie the conversation's original intent. As such, this essay investigates the biblical origins of this false equivalency and suggests how this usage might be disentangled to properly recenter the malevolence its users are attempting to describe.     

LONG-TERM FOLLOW-UP OF A BEHAVIORAL TREATMENT FOR STUTTERING IN CHILDREN

We report 3.5-year follow-up data from children who participated in a study that evaluated a behavioral treatment for stuttering. Six of 7 subjects continued to be at or below the criterion of 3% stuttered words. Stuttering increased for 1 subject, but remained far below his baseline level. Social validity data are also reported.     

Irrational beliefs and psychosomatic disorders

Irrational beliefs were related to psychosomatic disorders in an adult sample of 57 male and 68 female psychotherapy clients and 62 male and 38 female adult nonclients. The client and nonclient samples differed markedly in a number of ways, but nevertheless, in both samples those with relatively high frequencies of psychosomatic disorders scored as more irrational on 7 of the 10 scales of the Jones Irrational Beliefs Test (IBT) compared to those with relatively low frequencies of psychosomatic disorders. Hierarchical multiple regression analyses found Anxious Overconcern (AO) to account for 31.7% of the variance in the psychosomatic illness scores for the nonclient sample and 10.8% of the variance for the client sample. Subgroups within each sample formed on the basis of their AO scores (a B-level variable in RET theory) were subsequently found to be significantly different on the C-level variables of anxiety and psychosomatic disorders. It is argued that causal connections are implied and that the results are better understood in a monistic mind-body-unit conceptualization of the human organism.Paul J. Woods, Ph. D., co-editor of this journal, is a Fellow and an RET training supervisor of the Institute for Rational-Emotive Therapy, a professor of psychology at Hollins College, and is engaged in private practice in Roanoke, Virginia. Larry C. Lyons is a graduate student in the Masters' program in psychology at Hollins College.     

Mexican- and Anglo-American differences on the psychological screening inventory

This study investigated differences between Mexican- and Anglo-American college students on the Psychological Screening Inventory (PSI; Lanyon, 1970, 1973)-a brief personality instrument designed to detect persons who might benefit from more extensive evaluations in mental health settings. Further, this study controlled for the Mexican Americans' acculturation level, age, and socioeconomic status (SES), as these variables have routinely been shown to covary with other psychosocial variables. From data on 107 Mexican-American and 105 Anglo-American college students, we found that Mexican-American subjects had higher PSI scores on the Alienation and Defensiveness subscales and lower scores on the Social Nonconformity and Expression subscales than did Anglo-American subjects. With acculturation covaried, however, these differences were no longer statistically significant. With age and SES covaried, the two ethnic groups differed on Alienation, Expression, and Defensiveness, suggesting that Mexican Americans' performance on the PSI varies as a function of acculturation, age, and SES. Implications of these findings are discussed.     

Multidimensional scaling of rorschach inkblots: Relationships with structured self-report

This study attempted a replication of previous multidimensional scaling (MDS) results concerning the most salient perceptual features of the Rorschach inkblots. A second purpose was the investigation of the relationships between individual S's relative reliance on these salient features, and personality characteristics as assessed by the Jackson Personality Inventory (JPI). The two-dimension solution obtained in previous research, involving inkblot color and twomess of form, was closely replicated. Only very low correlations between Ss' use of these dimensions, and personality characteristics as measured by the JPI, were obtained. The MDS-Rorschach approach may prove useful in delimiting peculiarities of attention and perception in clinical states. The usefulness of the approach in furthering study of personality constructs assessed through traditional Rorschach administration is currently in question.