Dimensional and metric structures in multidimensional stimuli

The present experiments investigated two characteristics of subjects’ multidimensional representations: their dimensional organization and metric structure, for both analyzable and integral stimuli. In Experiment 1, subjects judged the dissimilarity between all pairs of stimuli differing in brightness and size (analyzable stimuli), while in Experiment 2, subjects made dissimilarity judgments for stimuli varying in width height, and area shape (integral stimuli). For the brightness size stimuli, the findings that (a) brightness judgments were independent of size (and vice versa) and (b) the best fitting scaling solution was one that depicted an orthogonal structure are strong evidence that subjects perceived brightness size as a dimensionally organized structure. In contrast, for the rectangle stimuli, neither width height nor area shape contributed additively to overall dissimilarity. The results of the metric fitting were more equivocal. For all stimulus sets, the Euclidean metric yielded scaling solutions with lower stress values than the city block metric. When bidimensional ratings were regressed on unidimensional ratings, the city block metric yielded a slightly higher correlation coefficient than the Euclidean metric for brightness size stimuli. The two rules of combination were equivalent for the width-height stimuli, but the Euclidean metric provided a better approximation for the area shape stimuli. The results were discussed in terms of how subjects integrate physical dimensions for the case of integral stimuli and the superiority of dimensional vs. metric structure as an indicator of stimulus analyzability.     

Are introverts still more religious?

The JEPQ and a religious attitude scale, ASC 4B, were completed by 1715 school children aged 11–17 yrs. Attitude to religion was found to decline across the age range, girls were found to be more religious than boys, and introverts more religious than extraverts. The relationship between introversion and religiosity is consistent with previous research and the present study adds substance to this relationship with the use of a more recent E scale on an extended age range.     

Hairdressers as caregivers. I. A descriptive profile of interpersonal help-giving involvements

The interpersonal help-giving behaviors of 90 hairdressers were explored in depth in an interview study. On the average, hairdressers saw 55 customers a week, and talked 25 minutes with each. About one-third of the talking time concerned clients' moderate to serious personal problems--particularly problems with children, physical health, marriage, depression, and anxiety. Hairdressers reported that offering sympathy and support, being lighthearted, just listening, and presenting alternatives were among their most frequent response strategies. Although they often enjoyed fielding clients' personal problems, at times they felt perplexed by them. Hairdressers perceived listening to customers' interpersonal problems to be an important part of their everyday function and expressed a need for professional inputs in that domain.     

The generality of learned helplessness in the rat

Two experiments were simultaneously conducted in which two different groups of 40 rats each were exposed to one of two different stressors. In both experiments half the subjects were pretreated with shock, half with underwater exposure. For each pretreatment stressor, half the subjects were allowed to escape, the other half were not. The experiments differed in the test task used. Approximately 24 hr after pretreatment, one-half the subjects from each pretreatment group received 20 water-escape trials in an underwater maze, the other half received 20 shock-escape trials in a two-way shuttle box. The subjects in each of the inescapable pretreatment conditions were slower to escape in the subsequent shock-escape and water-escape tasks when compared with subjects in the corresponding escapable pretreatment condition. The “learned helplessness” effect appeared to be no smaller when aversive stimuli were changed between pretreatment and test than when they remained the same.     

Hemispheric differences in processing visual patterns

The dichotomies verbal/visuospatial, serial/parallel and analytic/holistic are reviewed with respect to differences in hemispheric processing. A number of experimental parameters may be varied in such tasks, and together with certain frequently-occurring weaknesses of experimental design may account for the often discrepant results hitherto reported. The above factors are systematically reviewed, and three further experiments are reported which attempt to fill in the missing designs. Further evidence is given in support of the hypothesis that right-hemisphere superiority is most apparent in processes leading to identity matching. It is quantitative rather than qualitative, and may depend upon operations on the entire gestalt, such as holistic matching, mental rotation, reflection, distortion, etc., rather than, e.g., simultaneous (parallel) processing of discretely analysed or isolated features or elements. On the other hand left-hemisphere involvement in visuospatial processing is thought to reflect analysis of the configuration into its separable components; such processing may be either serial or parallel, and may frequently lead to a judgement different.     

Where the Sum of Our Expectation Fails Us: The Exchange Paradox

In the exchange paradox, two players receive envelopes containing different amounts of money. The assignment of the amounts ensures each player has the same probability of receiving each possible amount. Nonetheless, for each specific amount a player may find in his envelope, there is a positive expectation of gain if the player swaps envelopes with the other player, in apparent contradiction with the symmetry of the game. I consider a variant form of the paradox that avoids problems with improper probabilities and I argue that in it these expectations give no grounds for a decision to swap since that decision must be based on a summation of all the expectations. But this sum yields a non-convergent series that has no meaningful value. The conflicting recommendations – that it is to one or the other player's advantage to swap – arise from different ways of grouping terms in the sum that yield an illusion of convergence. I describe a generalized exchange paradox, explore some of its properties and display another example.     

Liability,culpability, and luck

Philosophical Studies - This paper focuses on the role of culpability in determining the degree of liability to defensive harm, and asks whether there are any restrictions on when culpability is...     

Integrated Treatment Programmes for Mothers with Substance Use Problems: A Systematic Review and Meta-analysis of Interventions to Prevent Out-of-home Child Placements

Approximately half of mothers receiving substance use treatment are involved with childcare proceedings. This review aims to determine whether integrated treatment programmes for mothers with substance use problems are effective in preventing out-of-home placement (temporally/permanent) and influencing other maternal factors such as patterns of substance use, treatment completion and parenting behaviours. Six trials were identified—two randomised controlled trials and four non-randomised controlled studies. The pooled sample of participants was 1717. The results showed that mothers who participated in integrated treatment programmes were significantly less likely to have the children removed from their care (Odds Ratio (OR)?=?0.40, 95% CI?=?0.27, 0.61), more likely to complete substance use treatment (OR?=?3.01, 95% CI?=?1.79, 5.06), and more likely to reduce their alcohol consumption (Standardised Mean Difference (SMD)?=??0.40, 95% Cl?=??0.78, ?0.01) and drug use (SMD?=??0.30, 95% CI?=??0.53, ?0.07). However, non-significant reductions were observed for parent–child conflict (SMD?=??0.35, 95% CI?=??0.72, 0.03) and child abuse risk (SMD?=??0.03, 95% CI?=??0.36, 0.31). While the findings from this review suggest that mothers involved in integrated treatment programmes could potentially be less likely to experience out-of-home child placements and more likely to improve substance use treatment outcomes, little evidence exists for the effectiveness of these interventions. Further research, particularly high-quality RCTs, is required to demonstrate and persuade health and public policy on the far-reaching value of the integrated approaches.

     

The effect of urbanization on innovation in spotted hyenas

Animal Cognition - Urbanization represents a dramatic form of evolutionary novelty in the landscapes inhabited by many extant animals. The Cognitive Buffer Hypothesis suggests that innovation, the...