The compatibility heuristic in non-categorical hypothetical reasoning: Inferences between conditionals and disjunctions

A new theory explains how people make hypothetical inferences from a premise consistent with several alternatives to a conclusion consistent with several alternatives. The key proposal is that people rely on a heuristic that identifies compatible possibilities. It is tested in 7 experiments that examine inferences between conditionals and disjunctions. Participants accepted inferences between conditionals and inclusive disjunctions when a compatible possibility was immediately available, in their binary judgments that a conclusion followed or not (Experiment 1a) and ternary judgments that included it was not possible to know (Experiment 1b). The compatibility effect was amplified when compatible possibilities were more readily available, e.g., for ‘A only if B’ conditionals (Experiment 2). It was eliminated when compatible possibilities were not available, e.g., for ‘if and only if A B’ bi-conditionals and exclusive disjunctions (Experiment 3). The compatibility heuristic occurs even for inferences based on implicit negation e.g., ‘A or B, therefore if C D’ (Experiment 4), and between universals ‘All A’s are B’s’ and disjunctions (Experiment 5a) and universals and conditionals (Experiment 5b). The implications of the results for alternative theories of the cognitive processes underlying hypothetical deductions are discussed.     

Book reviews

Gale. A., & Eysenck, M.W. (Eds.). (1992). Handbook of individual diffeences: Biological perspectives. Chicheste: Wiley. Pp. 395. ISBN 0-471-91155-0. £59.95 (Hbk.).

Honig, N. (1988). Pesonality: In seach of individuality. New York: Academic Press. Zuckeman, M. (1991). Psychobiology of Personality. Cambridge: Cambridge University Press.

McGrew, W.C (1992). Chimpanzee mateial culture: Implications fo human evolution. Cambridge: Cambridge University Press. Pp. xvi + 277. ISBN 0-521-41303-6. £40.00 (Hbk.). ISBN 0-521-42371-6. £16.95 (Pk.).

McGego, P.K. (Ed.) (1992). Playback and studies of animal communication. NATOASI Series Vol. 228. New York: Plenum Press. Pp. x + 231. ISBN 0-306-44205-1. Us$90.00 (Hbk.).

Gibson. K.R., & Ingold. T. (1993). Tools, language and cognition in human evolution. Cambridge: Cambridge University Press. Pp. xii + 483. ISBN 0-521-41474-1. £45.00 (Hbk.).

Amsel, A. (1992). Frustration theoy: An analysis of dispositional learning and memoy. Cambridge: Cambridge Univesity ress. Pp. xiii + 278. ISBN 0-521-24784-5. £35.00 (Hbk.).     

Individual differences in positive and negative interpretive biases

Student subjects were given the task of writing down the spellings of a series of words (many of them homophones) presented auditorily. Some of the homophones had a negative and neutral interpretation, whereas others had a positive and neutral interpretation. Subjects low in trait anxiety (high extraversion, low neuroticism) produced more positive homophone interpretations than did those low in positive affectivity; this constitutes a positive interpretive bias. Subjects very high in negative affectivity (in terms of trait anxiety) produced more negative homophone interpretations than did those lower in trait anxiety; this constitutes a negative interpretive bias. Theoretical implications of these biases were discussed.     

Implicit memory bias,explicit memory bias,and anxiety

Abstract

Normals high, medium, and low in trait anxiety performed two encoding tasks (one predominantly data-driven and the other conceptually driven) on threat-related and neutral words, followed by tests of word completion, cued recall, and free recall. Memory performance indicated the existence of negative memory biases in the high trait-anxious group, but it was generally not possible to decide whether the biases were associated with trait anxiety rather than with depression. The biases were obtained mainly when there was a match between the processes at encoding and those at the time of test, whether the matching processes were predominantly data-driven or conceptually driven. Implications of these findings for implicit and explicit memory biases associated with high trait anxiety are discussed.     

Testing a new cognitive behavioural treatment for obesity: A randomized controlled trial with three-year follow-up

It is remarkably difficult for people with obesity to maintain a new lower weight following weight loss. The aim of the present study was to examine the immediate and longer-term effects of a new cognitive behavioural treatment that was explicitly designed to minimise this post-treatment weight regain. One hundred and fifty female participants with obesity were randomized to the new treatment, behaviour therapy (the leading alternative psychological treatment) or guided self-help (a minimal intervention). Both of the main treatments resulted in an average weight loss of about ten percent of initial weight whereas weight loss was more modest with guided self-help. The participants were subsequently followed-up for three years post-treatment. The great majority regained almost all the weight that they had lost with the new treatment being no better than the behavioural treatment in preventing weight regain. These findings lend further support to the notion that obesity is resistant to psychological methods of treatment, if anything other than a short-term perspective is taken. It is suggested that it is ethically questionable to claim that psychological treatments for obesity “work” in the absence of data on their longer-term effects.     

A Cross-Lagged Model of the Development of ADHD Inattention Symptoms and Rapid Naming Speed

Although previous research has identified contemporaneous associations between cognitive deficits and symptom phenotypes in Attention Deficit/Hyperactivity Disorder, no studies have as yet attempted to identify direction of effect. The present study used cross-lagged path modeling to examine competing hypotheses about longitudinal associations between rapid naming speed and symptoms of inattention in children. 1,506 school-age twins from Australia and the U.S. were tested for inattention, hyperactivity/impulsivity, and rapid naming speed at three and four time points, respectively. Symptom severity of inattention from Kindergarten to fourth grade is consistently predicted by previous rapid naming, over and above auto-regressive and correlational associations in the model. Likewise, inattention symptoms have a small but significant predictive effect on subsequent rapid naming. The findings support a reciprocal relationship between naming speed and ADHD inattentive symptoms.     

Measurement equivalence: a comparison of methods based on confirmatory factor analysis and item response theory

Current interest in the assessment of measurement equivalence emphasizes 2 major methods of analysis. The authors offer a comparison of a linear method (confirmatory factor analysis) and a nonlinear method (differential item and test functioning using item response theory) with an emphasis on their methodological similarities and differences. The 2 approaches test for the equality of true scores (or expected raw scores) across 2 populations when the latent (or factor) score is held constant. Both approaches can provide information about when measurement nonequivalence exists and the extent to which it is a problem. An empirical example is used to illustrate the 2 approaches.     

Book reviews

Gordon, I. E. (1989). Theories of visual perception. Chichester: John Wiley & Sons. Pp. 273. ISBN 0-471-92196-3. £12.50.

Shepp, B. E. & Ballasteros, S. (Eds.) (1989). Object perception: Structure and process. Hillsdale, NJ: Lawrence Erlbaum Associates. Pp. 431. ISBN 0-8058-0060-3 (hardback) £44.95; ISBN 0-8058-0333-5 (paperback) £22.95.

Frith, U. (1989). Autism: Explaining the enigma. Oxford: Basil Blackwell. Pp. 204. ISBN 0-631-15833-2. £25.00 (hardback); £8.95 (paperback).

Rollins, M. (1989). Mental imagery: On the limits of cognitive science. New Haven, CT: Yale University Press. Pp. 170. ISBN 0-30-04491-7. £18.00.

Lloyd, D. (1989). Simple minds. Cambridge, MA: The MIT Press. Pp. 266. ISBN 0-262-12140-9. £22.50.

Howard, D. & Franklin, S. (1988). Missing the meaning? A cognitive neuropsychological study of the processing of words by an aphasic patient. Cambridge, MA & London: MIT Press. Pp. xix + 171. ISBN 0-262-08178-4. £22.50.

Evans, J. St. B. T. (1989). Bias in human reasoning. Hove and London: Lawrence Erlbaum Associates Ltd. ISBN 0-86377-106-8. £14.95 (hardback) ISBN 0-86377-156-4. £8.95 (paperback).

Clark, A. (1989). Micorcognition: Philosophy, cognitive science, and parallel distributed processing. Cambridge, MA: MIT Press/Bradford Books. Pp. 226. ISBN 0-262-03148-5. £14.95.     

Mother's personality and infant temperament

We examined if perfectionism and the perception of being an anxious person were associated with more negative infant temperament ratings by the mothers. 386 women (mean age = 30.08; standard deviation = 4.21) in their last trimester of pregnancy completed the Multidimensional Perfectionism Scale (MPS), the Beck Depression Inventory-II (BDI-II) and an item about their perception of being or not an anxious person. The Portuguese version of the Diagnostic Interview for Genetic Studies and the Operational Criteria Checklist for Psychotic Illness were used to generate diagnoses according to DSM-IV and ICD-10 criteria. After delivery, women completed eight items of the Difficult Infant Temperament Questionnaire (developed by our team) and filled in, again, the BDI-II and were interviewed with the DIGS. Women with depression (DSM-IV/ICD-10) and probable cases of depression using different cut-offs adjusted to Portuguese prevalence (BDI-II), in pregnancy and postpartum, were excluded. The Difficult Infant Temperament Questionnaire showed to have factorial validity and internal consistency. There was a statistically significant negative correlation between perfectionism total scale score and item 6 from the temperament scale (“is your baby irritable or fussy?”). Considering MPS 3-factor solution found for pregnancy there was also a statistically significant negative correlation between SOP and the same item. Women with low SOP differed from those with medium and high SOP in the total temperament score. Moreover, the low SOP group differed from the medium group on items three and four scores. There were no significant associations with SPP, which is the dimension more closely associated with negative outcomes. There was an association between anxiety trait status (having it or not) and scoring low, medium or high in the infant temperament scale. The proportion of anxious vs. non-anxious women presenting a high score on the infant temperament scale was higher (24.2% vs. 12.9%). Linear regressions showed that SOP (low vs. medium/high) offered a significant contribution to the prediction of total temperament scale score and items 3 and 4 scores, but a logistic regression did not confirm trait anxiety as a significant predictor of mother's infant temperament perception. Concluding, a major result concerns the fact that higher levels of adaptive perfectionism (i.e. SOP) are associated (and predict) a less negative view of their infant's temperament. These results on the effect of mother's anxiety and perfectionism on the child temperament perception might have treatment implications. As perfectionism is not always maladaptive, some of its positive features could be used to enhance women's self-efficacy/sense of parental competence in their role as mothers and positive affect towards their infants. Also, antenatal interventions aimed at minimising anxiety could help to optimise infant temperament outcomes, which could, eventually, also, lead to subsequent maternal and infant mental health better outcomes.