The adaptability of self-action perception and movement control when the limb is passively versus actively moved

Research suggests that perceptual experience of our movements adapts together with movement control when we are the agents of our actions. Is this agency critical for perceptual and motor adaptation? We had participants view cursor feedback during elbow extension–flexion movements when they (1) actively moved their arm, or (2) had their arm passively moved. We probed adaptation of movement perception by having participants report the reversal point of their unseen movement. We probed adaptation of movement control by having them aim to a target. Perception and control of active movement were influenced by both types of exposure, although adaptation was stronger following active exposure. Furthermore, both types of exposure led to a change in the perception of passive movements. Our findings support the notion that perception and control adapt together, and they suggest that some adaptation is due to recalibrated proprioception that arises independently of active engagement with the environment.     

Extinction of goal tracking also eliminates the conditioned reinforcing effects of an appetitive conditioned stimulus

Previous studies have suggested that the effects of extinction are response-specific. The present study investigated whether an extinction treatment that eliminated goal tracking elicited by an appetitive conditioned stimulus (CS) would also eliminate the conditioned reinforcing effects of that CS. Rats were first trained on a goal-tracking procedure in which an auditory CS was paired with a food unconditioned stimulus. Animals learned to approach the location where the food was delivered. In a subsequent phase, rats in one group received extinction training that eliminated the goal-tracking elicited by the CS. Rats in the other group did not experience extinction of the food-paired CS. Then, both groups received a test for conditioned reinforcement in which leverpresses resulted in the brief presentation of the stimulus previously paired with food. This stimulus did not act as a conditioned reinforcer in the group that had been subjected to extinction training, but did serve as a conditioned reinforcer in the group that did not experience extinction. These results indicate that the effects of extinction generalize from the approach-eliciting to the conditioned reinforcing effects of an appetitive CS.     

The impact of maternal postnatal depression on men and their ways of fathering: an interpretative phenomenological analysis

Objectives: Postnatal depression affects approximately 15% of women in Western countries. There are conflicting findings about the effects on fathers as well as the extent to which fathers buffer against the negative effects of depression on children. This study sought to understand the ways in which maternal postnatal depression affects men and their ways of fathering.

Design: Narrative interviews were conducted with 14 British fathers (mean age?=?33.9?years) whose (ex)partners had experienced at least one episode of postnatal depression. Interviews explored how their partner’s depression affected them, the partner relationship, their children and their ways of fathering. Data were analysed with interpretative phenomenological analysis.

Results and Conclusions: Men felt that their partner’s depression led to significant physical and/or psychological maternal absence as well as a fracturing of the family unit, which had been an important ideological foundation for men’s fathering. Unequal divisions of labour, unfulfilled expectations, a thwarting of preferred ways of fathering and preoccupation with their partner’s depression took some men away from fathering. Others reported adaptation by accepting the loss of shared parenting and investing in an exclusive father–child relationship. Fathering appears to be particularly affected by the loss of a close adult relationship.     

A kinematic comparison of successful and unsuccessful tennis serves across the elite development pathway

While velocity generation is an obvious prerequisite to proficient tennis serve performance, it is also the only stroke where players are obliged to negotiate a unique target constraint. Therefore, the dearth of research attending to the accuracy component of the serve is surprising. This study compared the body, racquet and ball kinematics characterising successful serves and service faults, missed into the net, in two groups of elite junior female players and one professional female tennis player. Three-dimensional body, racquet and ball kinematics were recorded using a 22-camera VICON motion analysis system. There were no differences in body kinematics between successful serves and service faults, suggesting that service faults cannot be attributed to a single source of biomechanical error. However, service faults missing into the net are characterized by projection angles significantly further below the horizontal, implying that consistency in this end-point parameter is critical to successful performance. Regulation of this parameter appears dependent on compensatory adjustments in the distal elbow and wrist joints immediately prior to impact and also perceptual feedback. Accordingly, coordination of the distal degrees of freedom and a refined perception-action coupling appear more important to success than any isolated mechanical component of the service action.     

Covert and overt orienting of attention to emotional faces in anxiety

Attentional biases for emotional faces were investigated in high, medium, and low anxiety groups (N = 54) using a probe detection task. Four types of facial expression (threat, sad, happy, neutral) were used to examine the specificity of the bias. Attentional bias measures were derived from manual reaction times (RTs) to probes and the direction of initial eye movement (EM) to the faces. The RT data indicated enhanced vigilance for threat rather than neutral faces in high and medium, but not low, state anxiety. The bias for negative faces appeared to be a combined function of stimulus threat value and the individual's anxiety level. The RT bias did not seem to depend on overt orienting, as many participants made few EMs. However, those who made frequent EMs to the faces showed concordance between the RT and EM bias measures, and so the RT measure of attentional bias for negative versus positive faces at 500 ms appears to provide a valid index of the direction of initial orienting to emotional stimuli. There was no evidence of an anxiety - related bias for happy faces (predicted by the emotionality hypothesis), nor a dysphoria - related bias for sad faces. However, increased dysphoria scores were associated with reduced attentiveness to happy faces.     

Dissociated developmental trajectories for semantic and phonological false memories

False recognition following presentation of semantically related and phonologically related word lists was evaluated in 8-, 11-, and 13-year-olds. Children heard lists of words that were either semantic (e.g., bed, rest, wake …) or phonological associates (e.g., pole, bowl, hole …) of a critical unpresented word (e.g., sleep, roll), respectively. A semantic false memory was defined as false recognition of a semantically related but unpresented word. A phonological false memory was defined as false recognition of a phonologically related but unpresented word. False memories in the two tasks showed opposite developmental trends, increasing with age for semantic relatedness and decreasing with age for phonological relatedness.     

Book briefly noted

Introducing Applied Ethics Edited by Brenda Almond, Blackwell, 1995. Pp. 375. ISBN 0–631–19389–8. £45.00 (hbk), £14.99 (pbk).

Environmental Ethics Edited by Robert Elliot, Oxford University Press, 1995. Pp. 255. ISBN 9–19–875144–3. £9.95 (pbk)

Medicine and Moral Reasoning Edited by K.W.M. Fulford, Grant Gillett and Janet Martin Soskice Cambridge University Press, 1994. Pp. 207. ISBN 0–521–45325–9 £37.50 (hbk), £12.95 (pbk).

Enlightenment and Religion. Rational Dissent in Eighteenth‐century Britain Edited by Knud Haakonssen, Cambridge University Press, 1996. Pp. xii + 348. ISBN 0–521–56060–8. £40.00.

Dialettica, Arte e Società: Saggio su Theodor W. Adorno By Giacomo Rinaldi, Quattroventi, Urbino, 1994. Pp. 205. L. 30,000.

Relevance: Communication and Cognition, new revised edition, By Dan Sperber and Deirdre Wilson, Blackwell, 1995. Pp. 326. ISBN 0–631–19878–4. £15.99.

Autobiographical Reflections By Eric Voegelin (Edited, with Introduction, by Ellis Sandoz), Louisiana State University Press, 1996. Pp. 131. ISBN 0807120766 $10.95.     

Death Anxiety Among University Students in Northern Ireland and Canada

Male and female university students in Northern Ireland (n = 315) and Canada (n = 255) completed Templer's Death Anxiety Scale (DAS) and the Taylor Manifest Anxiety Scale (MAS). Results of a discriminant function analysis indicated that Canadian students showed more concern about being afraid to die and thoughts of death, while students from the North of Ireland were more concerned about getting cancer, the shortness of life, and the viewing of a corpse. However, total DAS scores failed to show significance between group differences (p >.10). Correlations between DAS and MAS total scores were r =.34 for Northern Ireland and r =.31 for Canadian students.     

The disease concept of alcoholism: The persistence of an outmoded scientific paradigm

This paper discusses the reasons for the persistence of the disease model of alcoholism in the face of increasing evidence contradicting its basic assumptions. Data from in‐depth interviews with former problem drinkers are used to illustrate the ways in which the disease model: 1) shapes the empirical reality from which data for its support are derived, 2) implies methodological strategies which limit the possibility of its refutation and 3) blinds its supporters to the meaning of anomalous data. Implications for the immediate future of the disease model are discussed.