Fitts' Theorem and Movement Time Dissociation for Amplitude and Width Manipulations: Replying to Hoffmann

The commentary by Errol Hoffmann in this issue asserts that previous work by our group provides the spurious conclusion that amplitude and width manipulations to a movement environment elicit dissociable relations between movement time (MT) and P. M. Fitts' (1954) index of difficulty (ID). Hoffmann concludes that any such dissociation is the result of actions evoked entirely as ballistic. In this reply, we demonstrate that Hoffmann's commentary is a clear misrepresentation of the study goals and conclusions stated by our group. Additionally, we provide kinematic evidence that actions involving online trajectory amendments are associated with dissociable MT–ID relations for amplitude versus width manipulations. Finally, we contend that the kinematic analyses of movement trajectories, and Hoffmann's failure to acknowledge its importance, is an important step in further understanding speed–accuracy relations in human movement.     

Supervisory mentoring and employee affective commitment and turnover: The critical role of contextual factors

Past research has largely ignored the role of contextual factors in the relationships between supervisory mentoring and individual and organizational outcomes. In order to fill this void, we investigate how job scope and career and development opportunities, two critical contextual factors, moderate the supervisory mentoring-affective commitment-turnover links. Integrating social exchange theory with insights from situational approaches to leadership, we hypothesized that (a) job scope would interact with supervisory mentoring in predicting affective commitment and (b) career and development opportunities would interact with affective commitment in predicting turnover such that the conditional effects of supervisory mentoring on turnover would be stronger at high levels of these contextual moderators. Results of a study conducted with a sample of 228 business alumni, using 15-month voluntary turnover as outcome, supported our predictions. We discuss the implications of these findings for mentoring research and practice.     

Visual Perception Modifies Goal-directed Movement Control: Supporting Evidence from a Visual Perturbation Paradigm

It is well known that dynamic visual information influences movement control, whereas the role played by background visual information is still largely unknown. Evidence coming mainly from eye movement and manual tracking studies indicates that background visual information modifies motion perception and might influence movement control. The goal of the present study was to test this hypothesis. Subjects had to apply pressure on a strain gauge to displace in a single action a cursor shown on a video display and to immobilize it on a target shown on the same display. In some instances, the visual background against which the cursor moved was unexpectedly perturbed in a direction opposite to (Experiment 1), or in the same direction as (Experiment 2) the cursor controlled by the subject. The results of both experiments indicated that the introduction of a visual perturbation significantly affected aiming accuracy. These results suggest that background visual information is used to evaluate the velocity of the aiming cursor, and that this perceived velocity is fed back to the control system, which uses it for on-line corrections.     

Emotional Intelligence or Personality in Resistance to Change? Empirical Results in an Italian Health Care Context

This study investigated the role of personality traits and emotional intelligence in relation to resistance to change. The Eysenck Personality Questionnaire–Revised Short Form, the Bar‐On Emotional Quotient Inventory, and the Resistance to Change Scale were administered to 274 Italian physicians and nurses. With respect to resistance to change, the study revealed that emotional intelligence added a significant percentage of incremental variance compared with personality trait variances. The results highlight the role of emotional intelligence and its relationship with resistance to change and offer new research and intervention perspectives for career development and career counseling.     

A Sensorimotor Basis for Motor Learning: Evidence Indicating Specificity of Practice

Our previous work (Proteau, Marteniuk, Girouard, & Dugas, 1987) was concerned with determining whether with relatively extensive practice on a movement aiming task, as the skill theoretically starts becoming open-loop, there would be evidence for a decreasing emphasis on visual feedback for motor control. We eliminated vision of the moving limb after moderate and extensive practice and found that the movement became more dependent on this feedback with greater amounts of practice. In the present study, we wished to test the hypothesis, developed from our previous work, that at the base of movement learning is a sensorimotor representation that consists of integrated information from central processes and sensory feedback derived from previous experiences on the movement task. A strong test of this hypothesis would be the prediction that for an aiming task, the addition of vision, after moderate and relatively extensive practice without vision, would lead to an increasingly large movement decrement, relative to appropriate controls. We found good support for this prediction. From these and previous results, and the idea of the sensorimotor representation underlying learning, we develop the idea that learning is specific to the conditions that prevail during skill acquisition. This has implications for the ideas of generalized motor program and schema theory.     

Duration perception of emotional stimuli: Using evaluative conditioning to avoid sensory confounds

It has been found that emotional pictures are estimated to last longer than neutral ones. However, emotional and neutral stimuli often differ in their physical characteristics, too. Since this might also affect time perception, we present a method disentangling a possible confounding regarding the processing of physically different stimulus material. In the evaluative condition paradigm, participants, at first, learnt the association of neutral images with a certain Landolt ring and of emotional images with another Landolt ring with a different gap position. The conditioned Landolt rings were subsequently used in a temporal bisection task. In two experiments, the results revealed a temporal overestimation of Landolt rings conditioned with emotional pictures compared to neutral pictures showing that the temporal overestimation of emotional stimuli cannot be attributed to perceptual differences between neutral and emotional stimuli. The method provides the potential for investigating emotional effects on various perceptual processes.     

counselor nonverbal self‐disclosure and fear of intimacy during employment counseling: an aptitude—treatment interaction illustration

This study investigated the effects of nonverbal self‐disclosure within the dynamic of aptitude—treatment interaction. Participants (N= 94) watched a video of a career counseling session aimed at helping the jobseeker to find employment. The video was then edited to display 3 varying degrees of nonverbal self‐disclosure. In conjunction with the measure of counselor assessment, the authors measured the fear‐of‐intimacy level by using the Doi and Thelen (1993) model. Results showed that when self‐disclosure does not have an effect on counselor assessment, a moderator effect due to the fear of intimacy becomes evident. Implications for research and practice are presented.