Working memory capacity predicts the beneficial effect of selective memory retrieval

Selective retrieval of some studied items can both impair and improve recall of the other items. This study examined the role of working memory capacity (WMC) for the two effects of memory retrieval. Participants studied an item list consisting of predefined target and nontarget items. After study of the list, half of the participants performed an imagination task supposed to induce a change in mental context, whereas the other half performed a counting task which does not induce such context change. Following presentation of a second list, memory for the original list's target items was tested, either with or without preceding retrieval of the list's nontarget items. Consistent with previous work, preceding nontarget retrieval impaired target recall in the absence of the context change, but improved target recall in its presence. In particular, there was a positive relationship between WMC and the beneficial, but not the detrimental effect of memory retrieval. On the basis of the view that the beneficial effect of memory retrieval reflects context-reactivation processes, the results indicate that individuals with higher WMC are better able to capitalise on retrieval-induced context reactivation than individuals with lower WMC.     

The Role of Concurrent Feedback in Learning to Walk Through Sliding Doors

Concurrent feedback is defined as information about performance given to participants during the execution of an action. This article investigates whether concurrent feedback is beneficial or detrimental to the learning of an ecologically relevant task. Eighteen participants were asked to walk through a virtual corridor and they practiced over 1110 trials to adjust their walking speed so as to pass through sliding doors that opened and closed at a frequency of 1 Hz. Concurrent feedback informed them about the possible need to accelerate or decelerate. Performance of participants who received concurrent feedback on 66% of the practice trials (on average) did not differ significantly from performance of participants who did not receive concurrent feedback. Furthermore, participants of both of these groups significantly outperformed participants who received concurrent feedback on all practice trials. These results are discussed in relation to the perceptual-motor mechanisms that underlie the control of the action. Also discussed are implications for future research, including the use of self-controlled feedback and the use of multisensory training programs.     

Direct Learning

The theory of direct perception holds that perception is specific to properties of ambient energy arrays. This article explores a similar approach to perceptual and perceptual-motor learning: Change due to learning is portrayed as specific to properties of ambient energy arrays. This type of learning is labeled direct learning. It is argued that a theory of direct learning explains a wide range of phenomena in ecologically relevant and informationally rich situations as well as in simpler experimental situations. Previous experimental results are reanalyzed and reinterpreted from the perspective of direct learning. To achieve this, the notion of information space is introduced. In information spaces, points represent ambient energy variables, paths represent change due to learning, and vector fields represent information that guides learning. These concepts also allow the theory of direct learning to be connected to and to take advantage of the theory of ordinary differential equations.     

Static and Phasic Cross-Talk Effects in Discrete Bimanual Reversal Movements

The authors examined the hypothesis that the phasic and the static cross-talk effects found in bimanual movements with different target amplitudes originate at different functional levels of motor control, which implies that the effects can be dissociated experimentally. When the difference between the short and the long amplitudes assigned to the 2 hands of 12 participants was decreased, the static effect disappeared. In contrast, the phasic effect, which can be observed only at short preparation intervals, did not disappear; although it became smaller in absolute terms, in relative terms it did not. In addition, the authors compared the time course of amplitude assimilation with the time course of amplitude variability and examined the correlation between left hand and right hand amplitudes. The disappearance of the phasic amplitude assimilation at increasing preparation intervals turned out to be delayed relative to the decline of the correlation between amplitudes. That finding suggests that the assimilation of mean amplitudes and the correlation between left hand and right hand amplitudes are not fully equivalent indicators of intermanual interactions, but may indicate different kinds of inter-limb coupling.     

Influence of delayed muscle reflexes on spinal stability: Model-based predictions allow alternative interpretations of experimental data

Model-based calculations indicate that reflex delay and reflex gain are both important for spinal stability. Experimental results demonstrate that chronic low back pain is associated with delayed muscle reflex responses of trunk muscles. The aim of the present study was to analyze the influence of such time-delayed reflexes on the stability using a simple biomechanical model. Additionally, we compared the model-based predictions with experimental data from chronic low back pain patients and healthy controls using surface-electromyography. Linear stability methods were applied to the musculoskeletal model, which was extended with a time-delayed reflex model. Lateral external perturbations were simulated around equilibrium to investigate the effects of reflex delay and gain on the stability of the human lumbar spine. The model simulations predicted that increased reflex delays require a reduction of the reflex gain to avoid spinal instability. The experimental data support this dependence for the investigated abdominal muscles in chronic low back pain patients and healthy control subjects. Reflex time-delay and gain dependence showed that a delayed reflex latency could have relevant influence on spinal stability, if subjects do not adapt their reflex amplitudes. Based on the model and the experimental results, the relationship between muscle reflex response latency and the maximum of the reflex amplitude should be considered for evaluation of (patho) physiological data. We recommend that training procedures should focus on speeding up the delayed reflex response as well as on increasing the amplitude of these reflexes.     

Understanding alexithymia in female adolescents: The role of attachment style

Adults with alexithymia retrospectively report emotional difficulties with caregivers during childhood. However, the association between attachment style and alexithymic traits may be evident at an earlier stage than adulthood, i.e. during adolescence. Sixty school-based healthy females aged 9–18 years (mean 14.08, SD 2.71 years) participated in an Attachment Style Interview (ASI) and completed the Toronto Alexithymia Scale (TAS-20). Greater levels of alexithymia were exhibited by both anxious and avoidant insecurely attached groups compared to securely attached participants. Fear of separation (characteristic of anxious attachment style) predicted both overall alexithymia scores and the specific alexithymic trait of ‘difficulty identifying feelings’ (DIF). Constraints on closeness (an avoidant attachment attitude) predicted ‘difficulty describing feelings’ (DDF). Low felt attachment to primary caregiver was a predictor of ‘externally oriented thinking’ (EOT). These findings indicate that features of anxious and avoidant insecure attachment styles are differentially related to the separate facets of alexithymia in female adolescents. Specifically, the findings concerning fear of separation may reflect the adolescent struggle for autonomy and the resulting effects on the affect regulation system. Our results also suggest that the normative differentiation of the emotional and cognitive aspects of alexithymia may occur on a developmental trajectory.     

The biasing effect of personality on self-estimates of cognitive abilities in males and females

In addition to exploring the relationship between psychometric and self-estimated measures of Crystallized Knowledge (Gc) and Visual Processing (Gv), this study investigated whether personality significantly moderated these relationships, thereby influencing the accuracy of the self-estimates. Adult participants (N = 165) completed the Big Five Inventory and self-estimated their levels of Gc and Gv. They were subsequently administered the Multidimensional Aptitude Battery II, a group test of cognitive ability. Significant and positive relationships between psychometric Gc and Gv and their respective self-estimates were found. Additionally, investigation of the moderating effects of personality for each gender separately using standard multiple regressions found that females high in Extraversion and males low in Conscientiousness were more prone to overestimating their Gv ability, while males high in Openness provided more accurate estimates of their Gv than those low in Openness. Elucidating the personality traits that distort self-perceptions of intellectual functioning has significant implications for the identification of individuals at risk of harboring inaccurate expectations, leading to the potential for interventions aimed at ameliorating associated deleterious consequences.     

Posttraumatic Stress in Women with Breast Cancer and Their Daughters

Using the PTSD Reaction Index, posttraumatic stress was assessed in 133 women with breast cancer and 64 of their daughters. Twenty-one percent of patients and 13% of daughters reported symptoms consistent with PTSD. PTSD in these patients without bone marrow transplants may be higher than reported in other samples, and the prevalence of PTSD symptoms in the daughters appear comparable to women with breast cancer. For patients, cancer stage at diagnosis was positively associated with posttraumatic stress severity. Mothers experiencing PTSD symptoms were significantly more likely to have daughters experiencing PTSD symptoms. Intergenerational patterns in reaction to breast cancer are discussed.     

Secondary Revision: On Rethinking the Analytic Process and Analytic Technique

The author relates aspects of his own personal history and professional development in an effort to explain the changes in his way of thinking and working as an analyst that have evolved over the past thirty years. He also includes some of his current thinking on the questions of countertransference, the uses of memory, and contemporary analytic technique.     

On Unconscious Communications and Covert Enactments: Some Reflections on Their Role in the Analytic Situation

By means of an extended clinical example, this paper focuses on the impact that unconscious communications in the form of nonverbal behavior may have on the course and outcome of an analysis.

Responding to sudden catastrophic illnesses in their fathers, patient and analyst created enactments aimed at blinding them to hard truths about their relationships with this parent.

Serving as powerful resistances that led to a stalemate and all but ended treatment, these nonverbal enactments had to be recognized, confronted, and understood by both participants before analytic work could be resumed and progress achieved in this analysis.