"Constructive" enumeration by chimpanzees (Pan troglodytes) on a computerized task

Two chimpanzees used a joystick to collect dots, one at a time, on a computer monitor (see video-clip in the electronic supplementary material), and then ended a trial when the number of dots collected was equal to the Arabic numeral presented for the trial. Both chimpanzees performed substantially and reliably above chance in collecting a quantity of dots equal to the target numeral, one chimpanzee for the numerals 1–7, and the second chimpanzee for the numerals 1–6. Errors that were made were seldom discrepant from the target by more than one dot quantity, and the perceptual process subitization was ruled out as an explanation for the performance. Additionally, analyses of trial duration data indicated that the chimpanzees were responding based on the numerosity of the constructed set rather than on the basis of temporal cues. The chimpanzees' decreasing performance with successively larger target numerals, however, appeared to be based on a continuous representation of magnitude rather than a discrete representation of number. Therefore, chimpanzee counting in this type of experimental task may be a process that represents magnitudes with scalar variability in that the memory for magnitudes associated with each numeral is imperfect and the variability of responses increases as a function of the numeral's value. Accepted after revision: 11 June 2001 Electronic Publication     

The McMaster Approach to Families: theory, assessment, treatment and research

The McMaster Approach to Families is a comprehensive model of family assessment and treatment. This paper provides an overview of the McMaster Approach and consists of five major sections. First, the under-lying theoretical model (McMaster Model of Family Functioning) is described. Second, the three assessment instruments of the approach (Family Assessment Device, McMaster Clinical Rating Scale, McMaster Structured Interview of Family Functioning) and their psychometric properties are summarized. Third, the family treatment model (Problem Centered Systems Therapy of the Family) is presented. Fourth, the research conducted using the McMaster Approach is reviewed. Finally, the clinical uses and advantages of the McMaster Approach are discussed.     

Evidence of Absence: Abstract Metrical Structure in Speech Planning

Rhythmic structure in speech is characterized by sequences of stressed and unstressed syllables. A large body of literature suggests that speakers of English attempt to achieve rhythmic harmony by evenly distributing stressed syllables throughout prosodic phrases. The question remains as to how speakers plan metrical structure during speech production and whether it is planned independently of phonemes. To examine this, we designed a tongue twister task consisting of disyllabic word pairs with overlapping phonological segments and either matching or non-matching metrical structure. Results showed that speakers had more difficulty producing metrically regular word pairs, compared to irregular pairs; that is, word pairs with irregular meter had faster productions and fewer speech errors in this production task. This finding of metrical regularity inhibiting production is inconsistent with an abstract metrical structure that is planned independently of phonemes at the point of phonological encoding.     

The Similarity-Attraction Link: Sequential Versus Parallel Multiple-Mediator Models Involving Inferred Attraction,Respect, and Positive Affect

We tested the hypothesis that the attitude similarity effect spreads sequentially through positive affect, respect, and inferred attraction to attraction. In Experiment 1, participants received information about a partner's similar or dissimilar attitudes and reported one of the three mediators before attraction. The similarity-attraction link was mediated by positive affect or respect but more strongly by inferred attraction. In Experiment 2, the three mediators were measured in different orders. Results falsified parallel and combined parallel-sequential multiple-mediator models and two of the fully sequential multiple-mediator models but supported four fully sequential models that were consistent with the affect-centered and affect primacy hypotheses.     

Elaboration and choice

Dhar and Gorlin (2013) proposed a dual-process perspective on choice. We applaud the effort to generate such a model, and we support the effort to integrate potentially disparate literatures under a general theoretical approach. In an attempt to further that goal of integration, we discuss similarities and differences between the proposed approach and the Elaboration Likelihood Model (Petty, 1977, Petty and Cacioppo, 1979, Petty and Cacioppo, 1986) — one of the earliest models of evaluative judgment to propose different mechanisms and consequences of judgments formulated at different levels of motivation and ability to process available information. In addition, because many choice settings involve familiar options that have been previously evaluated, we discuss potential implications of the literature on influences of attitudes on behavior (which can often be framed as involving a choice to act or not or to act in one way rather than another). In each case, we believe that these previous social psychological literatures provide insights that could enhance and extend the proposed model.     

Approach–avoidance actions or categorization? A matching account of reference valence effects in affective S–R compatibility

Theories from diverse areas of psychology assume a compatibility relation between affective stimuli and approach–avoidance actions and imply that the reference object (self vs. other) for the movement determines the direction of the compatibility effect. However, studies on the influence of reference valence are still sparse. We conducted three experiments to test a matching account of actions that move targets toward or away from a centrally located referent. When the referent was positive (Albert Einstein), participants were faster to move positive words toward and negative words away from the referent than to move negative words toward and positive words away from the referent. When the referent was negative (Adolf Hitler), these relations reversed. These results cannot be interpreted with current motivational or cognitive accounts but are in accord with the matching account.     

Sex Differences in Religiosity: The Role of Attachment to Parents and Social Learning

We employed aspects of both attachment theory and social learning theory to develop an understanding of sex differences in young adults’ attachment to God, their concepts of God, and other aspects of their religiosity. We found that attachment to God is more likely to be associated with attachment to the same-sex parent than to the opposite-sex parent. We found that this is also true for concepts of God as loving, controlling, and distant in female, but not male participants in our study. For both males and females, mother’s level of religious involvement when they were growing up was associated with participants’ later attendance at religious services, but for males, attachment to father was an additional influence. In neither males nor females was attachment to either parent or their parent’s past religious involvement a significant predictor of strength of religious faith.     

Twenty-year trends of authorship and sampling in applied biomechanics research

This study documented the trends in authorship and sampling in applied biomechanics research published in the Journal of Applied Biomechanics and ISBS Proceedings. Original research articles of the 1989, 1994, 1999, 2004, and 2009 volumes of these serials were reviewed, excluding reviews, modeling papers, technical notes, and editorials. Compared to 1989 volumes, the mean number of authors per paper significantly increased (35 and 100%, respectively) in the 2009 volumes, along with increased rates of hyperauthorship, and a decline in rates of single authorship. Sample sizes varied widely across papers and did not appear to change since 1989.