Moving farther but faster: an exception to Fitts's law

Fitts's law holds that movement time (MT) increases with longer distances. Here we report a violation of this law: When the target appears in a structured, linear display with placeholders indicating the possible target locations, MT to the most distant target is not longer than MT to the second most distant target, but rather tends to be shorter. Furthermore, the presence of placeholders attenuates the range effect that occurs in the absence of placeholders. These findings suggest that Fitts's law may be limited to egocentric visuomotor action, and that the visual control of hand movements may use allocentric, in addition to egocentric, spatial information.     

Growing older does not always mean moving slower: examining aging and the saccadic motor system

Although humans typically move more slowly as they age, one exception may be the saccadic motor system. To fully determine whether the execution of saccades is affected by age, the authors examined detailed kinematics of vertical and horizontal saccades across a range of saccadic amplitudes (4 degrees, 8 degrees, and 12 degrees). Ten younger and 20 older adults participated in each experiment. Whereas in the 1st experiment, the authors assessed volitionally generated saccades, in the 2nd experiment, they evaluated reflexively generated saccades. The results of those experiments showed that the saccadic motor system is relatively impervious to the effects of aging; in fact, the differences between vertical and horizontal saccades were more evident than were differences between saccades produced by younger and older adults. The authors discuss possible reasons for that relative resistance to aging.     

Trait and social processes in the link between social support and affect: an experimental, laboratory investigation

This study investigated the extent to which the link between perceived social support and affect reflected support recipients' trait perceived support as well as three distinct social processes: the objective supportiveness of providers, the unique relationships among recipients and providers that were stable over occasions, as well as the unique relationships that varied across occasions. Ten recipients interacted with each of the same four providers on five separate occasions, for a total of 200 interactions. Recipients and independent observers rated recipient affect and provider support. Greater perceived support was related to greater positive affect for recipients' trait perceived support, as well as for relationships that were stable over occasions and relationships that varied across occasions. No social support effects were found for negative affect. Perceived similarity was a consistent predictor of recipients' support perceptions. Implications for social support models and interventions were discussed.     

Parenting cognitions and treatment beliefs as predictors of experience using behavioral parenting strategies in families of children with attention-deficit/hyperactivity disorder

We tested a model of mothers' parenting efficacy and attributions for child ADHD behaviors as predictors of experiences with behavioral treatment. The model proposed that mothers' beliefs regarding the acceptability and effectiveness of behavioral strategies would intervene between mothers' cognitions about parenting and child behavior and their treatment experiences. Participants were 101 mothers of 5- to 10-year-old children (82% male) with ADHD. Mothers reported their parenting efficacy and attributions for child behavior, and then received a single session of treatment teaching 2 behavior management strategies. Then, mothers reported their beliefs regarding the acceptability and effectiveness of these strategies. A follow-up phone interview 1 week later assessed mothers' experiences in using the behavioral strategies. The overall model fit the data. Attributions of child ADHD behavior as more pervasive, enduring, and within the child's control were related to seeing behavioral treatment as more acceptable, but neither attributions nor treatment acceptability predicted treatment experience. However, mothers with higher parenting efficacy viewed the behavioral strategies as more likely to be effective, and this pathway significantly predicted positive treatment experience. Implications for understanding the variables that contribute to parental decision-making and treatment participation for childhood ADHD are considered.     

Oversimplifying evolutionary psychology leads to explanatory gaps

Comments on Evolutionary psychology: Controversies, questions, prospects, and limitations (see record 2010-02208-001) by Confer et al. They argued that SST cannot explain the existence of either homosexuality or suicide within the human species. We contend that a sufficiently nuanced evolutionary position has no difficulties explaining either phenomenon. Also in this account, it is assumed that all psychological functioning must serve survival and reproduction. However, since evolution selects against certain qualities (it does not select for qualities, as it is commonly, but incorrectly, described), two types of qualities should remain intact for any species: (a) those that facilitate survival and reproduction and (b) those that do not impede survival and reproduction at the population level.     

Maximum-corrected and chance-corrected measures of effect size for the Mantel-Haenszel test

Two measures of effect size are described for the Mantel-Haenszel test. Both measures belong to the r-family of effect size measures. One measure is based on a maximum-corrected model, and the second measure is based on a chance-corrected model.     

Aristotle's De Anima: On Why the Soul is Not a Set of Capacities

Although it is common for interpreters of Aristotle's De Anima to treat the soul as a specially related set of powers of capacities, I argue against this view on the grounds that the plausible options for reconciling the claim that the soul is a set of powers with Aristotle's repeated claim that the soul is an actuality cannot be unsuccessful. Moreover, I argue that there are good reasons to be wary of attributing to Aristotle the view that the soul is a set of powers because this claim conflicts with several of his metaphysical commitments, most importantly his claims about form and substance. I argue that although there are passages in the De Anima in which Aristotle discusses the soul in terms of its powers or capacities, these discussions do not establish that the soul is a set of capacities.     

Familiar and unfamiliar face recognition: A review

Since the 1970s there has been a continuing interest in how people recognise familiar faces (Bruce, 1979 Bruce, V. 1979. Searching for politicians: An information processing approach to face recognition. Quarterly Journal of Experimental Psychology, 31: 373–395. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]; Ellis, 1975 Ellis, H.D. 1975. Recognising faces. British Journal of Psychology, 66: 409–426. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). This work has complemented investigations of how unfamiliar faces are processed and the findings from these two strands of research have given rise to accounts that propose qualitatively different forms of representation for familiar and unfamiliar faces. Evidence to suggest that we process familiar and unfamiliar faces in different ways is available from cognitive neuropsychology, brain scanning, and psychophysics. However, in this review we focus on the evidence, available from experimental investigations of how people recognise faces, for different types of representation existing for each type of face. Factors affecting recognition are evaluated in terms of how they apply to familiar and unfamiliar faces and categorised according to the nature of their impact. In the final section this evidence, along with recent advances in the field, is used to explore the way in which unfamiliar faces may become familiar and the factors that may be important for the development of familiar face representations.     

Creative Writing as a Medical Instrument

Listening and responding to patients’ stories for over 20 years as an emergency physician has strengthened my appreciation for the many ways that the skills and principles drawn from writing fiction double as necessary clinical skills. The best medicine doesn’t work on the wrong story, and the stories patients tell sometimes feel like first drafts—vital and fragile works-in-progress. Increasingly complex health challenges compounded by social, financial, and psychological burdens make for stories that are difficult to articulate and comprehend. In this essay, I argue that healthcare providers need to think like creative writers and the skills and sensitivities necessary to story construction deserve a vital space in medical education. A thorough understanding of story anatomy and the imaginative flexibility to work stories into open spaces serve as antidotes to the reductive nature of clinical decision making and have implications as patient safety and risk management strategies. The examples that I have selected demonstrate how thinking like a creative writer functions at the bedside, providing tools for clinical excellence and empathy. This approach asks that we re-imagine the importance of story in clinical care: from a vehicle to a diagnosis to its place as a critical destination.