An inverse relationship between baseline fixed-interval response rate and the effects of a tandem response requirement.

Previous experiments examining the effects of adding a tandem fixed-ratio response requirement on fixed-interval schedule performance have reported inconsistent results. One variable that may account for such inconsistencies is the baseline response rate in the fixed-interval condition. This possibility was investigated in the present study. Rats were given histories with either interresponse times greater than 11 s or fixed-ratio 40 schedules of reinforcement, which engendered either relatively low or high rates of responding, respectively, in the subsequent fixed-interval condition. A tandem ratio response requirement (fixed-ratio 9) was then introduced. The effects of adding this tandem response requirement were inversely related to the baseline fixed-interval response rates; low rates of responding in the fixed-interval condition were markedly increased, whereas high rates of responding were relatively unaffected. This inverse relationship appears to be similar to the rate-dependent relations observed in behavioral pharmacology. These results may provide an explanation for the inconsistent findings reported in previous studies on tandem fixed-interval fixed-ratio schedules and suggest that principles of behavioral pharmacology research may be applicable to the study of the effects of nonpharmacological variables on schedule-controlled behavior.     

Cognitive processes,school achievement,and comprehension of ambiguous sentences

Previous research has identified three distinct forms of linguistic ambiguity: lexical, surface structural, and deep structural. Cummins and Das (1978) studied these forms of ambiguity in the context of Das, Kirby and Jarman's (1979) model of simultaneous and successive processing, and demonstrated that comprehension of lexical ambiguity depended upon simultaneous processing, while that of surface and deep structural ambiguity depended upon successive processing. The present study investigated the relationship between these cognitive and linguistic processes in a group of older children. The subjects' level of English achievement was also considered. The results showed that comprehension of all three forms of ambiguity was strongly related to level of English achievement, though deep structure ambiguities best descriminated the English achievement groups. Results also showed that perception of all types of ambiguity was related to both simultaneous and successive processing. Subjects with high successive processing scores had an additional advantage in perceiving deep structure ambiguities. These results suggest the need for an elaboration of the Cummins and Das cognitive process model of liguistic processes, demonstrating that a variety of task variables can alter the cognitive processes required in performance of linguistic tasks.This study was supported by an Australian Research Grants Committee grant to J. B. Biggs and the author.     

Acute Alcohol Co‐Ingestion and Hospital‐Treated Deliberate Self‐Poisoning: Is There an Effect on Subsequent Self‐Harm?

The aim of this study was to determine the relationship between alcohol co‐ingestion in an index deliberate self‐poisoning (DSP) episode with repeated DSP and subsequent suicide. A retrospective cohort study was conducted involving 5,669 consecutive index presentations to a toxicology service following DSP between January 1, 1996, and October 31, 2010. Records were probabilistically matched to National Coronial Information System data to identify subsequent suicide. Index DSPs were categorized on co‐ingestion of alcohol, and primary outcomes analyzed were repetition of any DSP, rates of repeated DSP, time to first repeat DSP, and subsequent suicide. Co‐ingestion of alcohol occurred in 35.9% of index admissions. There was no difference between those who co‐ingested alcohol (ALC+) and those who did not co‐ingest alcohol (ALC?) in terms of proportion of repeat DSP, number of DSP events, or time to first repeat DSP event. Forty‐one (1.0%) cases were probabilistically matched to a suicide death; there was no difference in the proportion of suicide between ALC+ and ALC? at 1 or 3 years. There was no significant relationship between the co‐ingestion of alcohol in an index DSP and subsequent repeated DSP or suicide. Clinically, this highlights the importance of mental health assessment of patients that present after DSP, irrespective of alcohol co‐ingestion at the time of event.     

Couple-based interventions for medical problems

The current paper discusses general principles, therapeutic strategies, common factors, and domains commonly addressed in the treatment of couples who have a partner with a medical condition. Couple-based interventions for medical problems are contrasted with couple therapy and relationship education in that the emphasis is on assisting the patient in addressing the medical disorder, along with being attentive to the patient's partner and their relationship. Guidelines are provided showing how knowledge and understanding of medical disorders and couple functioning are integrated in order to conduct such interventions. Five common domains addressed during intervention are elaborated upon: (a) psychoeducation about the disorder, (b) sharing thoughts and feeling regarding the disorder, (c) making decisions focal to the medical disorder, (d) implementing relationship changes that are nonmedical but that result from the disorder, and (e) addressing relationship functioning unrelated to the disorder. The importance of empirically demonstrating the utility of each domain in future investigations is noted.     

Reviews: Books, Art

THREE MOTHERS THREE DAUGHTERS: PALESTINIAN WOMEN'S STORIES. By Michael Gorkin and Rafiqa Othman. New York: Other Press, 2000, $20 (softcover printing of 1996 University of California Press book). BREATHING SPACE: A SPIRITUAL JOURNEY IN THE SOUTH BRONX. By Heidi B. Neumark. 286 pp. Boston: Beacon Press, 2003. $25. KNOCKING ON HEAVEN'S DOOR: AMERICAN RELIGION IN THE AGE OF COUNTERCULTURE. By Mark Oppenheimer. 285 pp. New Haven, CT: Yale University Press, 2003. $30. PROFILES OF PLAY: ASSESSING AND OBSRVING STRUCTURE AND PROCESS IN PLAY THERAPY. By Saralea Chazan. 224 pp. London and Philadelphia: Jessica Kingsley Publishers, 2002. $24.95. THE HAPPINESS PARADOX. By Ziyad Marar. 209 pp. London: Reakition Books, 2003. $19.95. GOD AT THE EDGE: SEARCHING FOR THE DIVINE IN UNCOMFORTABLE AND UNEXPECTED PLACES. By Niles Elliot Goldstein. 197 pp. New York: Random House, 2003. $22. THE RURAL LIFE. By Verlyn Klinkenborg. 213 pp. New York: Little, Brown and Company, 2003. $20. OAXACA JOURNAL. By Oliver Sacks. 159 pp. Washington, DC: National Geographic Directions, 2002. $20. THE MAYS OF VENTADORA. By W.S. Merwin. 159 pp. Washington, DC: National Geographic Directions, 2002, $20.     

Feigning combat-related posttraumatic stress disorder on the personality assessment inventory

This study examined whether individuals who were instructed on the Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM-IV]; American Psychiatric Association, 1994) criteria for posttraumatic stress disorder (PTSD) could feign PTSD on the Personality Assessment Inventory (PAI; Morey, 1991). The study also investigated whether PAI indexes of symptom exaggeration, the Negative Impression Management (NIM) scale and the Malingering index, could identify individuals feigning PTSD. The diagnostic rule for PTSD (Morey, 1991, 1996) was applied to the profiles of a group of 23 veterans with combat-related PTSD and 23 male undergraduates instructed to malinger PTSD. Seventy percent of the student malingerers produced profiles that received diagnostic consideration for PTSD. The NIM cutting score (> or = 8) was highly effective in detecting simulation of PTSD but resulted in the misclassification of a large number of true PTSD cases. There were no significant differences in the overall efficiency of the test with various validity criteria. We discuss the implications of these findings for the use of the PAI in the diagnosis of combat-related PTSD.     

Measuring automatic retrieval: a comparison of implicit memory, process dissociation, and speeded response procedures

Using the stem completion task, we compared estimates of automatic retrieval from an implicit memory task, the process dissociation procedure, and the speeded response procedure. Two standard manipulations were employed. In Experiment 1, a depth of processing effect was found on automatic retrieval using the speeded response procedure although this effect was substantially reduced in Experiment 2 when lexical processing was required of all words. In Experiment 3, the speeded response procedure showed an advantage of full versus divided attention at study on automatic retrieval. An implicit condition showed parallel effects in each study, suggesting that implicit stem completion may normally provide a good estimate of automatic retrieval. Also, we replicated earlier findings from the process dissociation procedure, but estimates of automatic retrieval from this procedure were consistently lower than those from the speeded response procedure, except when conscious retrieval was relatively low. We discuss several factors that may contribute to the conflicting outcomes, including the evidence for theoretical assumptions and criterial task differences between implicit and explicit tests.     

Attributional biases in aggressive children and their mothers

To investigate if mothers and their aggressive children share the tendency to infer hostile motives from others' behavior in ambiguous social situations, 100 pairs of mothers and their clinic-referred or comparison children (50 boys and 50 girls) were asked to interpret hypothetical situations involving both overtly and relationally provocative scenarios. Results replicated previous findings of studies on social information processing of aggressive children and extended the findings to mothers of aggressive children. Findings were generally consistent with the hypothesis that mothers of aggressive children tend to view others' ambiguous actions as hostile, increasing the probability of responding with aggression and, in effect, modeling a hostile attributional bias for their children. Examinations of mothers' and their children's attributional and behavioral intentions suggested that mothers' and daughters' attributions and behavioral intentions were significantly correlated, whereas mothers' and sons' were not. Gender effects with regard to provocation type are also discussed.     

Psychosocial predictors of delay of first sexual intercourse by adolescents.

This investigation predicted adolescents' delay of intercourse onset from attitudes, social norms, and self-efficacy about refraining from sexual intercourse. Age, gender, ethnicity, and parental education were also examined as predictors and moderators of the relationships among the 3 psychosocial determinants and onset. The participants (N = 827), part of a cohort initially surveyed in the 9th grade, reported at baseline that they had never engaged in intercourse. The multivariable proportional hazards regression model suggested that adolescents with more positive attitudinal and normative beliefs, as well as those with a parent who graduated from college, were less likely to engage in intercourse in the follow-up period (up to approximately 2 years). Interventions that include an objective to delay onset may benefit from addressing psychosocial determinants, especially attitudes and norms about sexual intercourse.