Early evidence affects later decisions: Why evidence accumulation is required to explain response time data

Models of decision making differ in how they treat early evidence as it recedes in time. Standard models, such as the drift diffusion model, assume that evidence is gradually accumulated until it reaches a boundary and a decision is initiated. One recent model, the urgency gating model, has proposed that decision making does not require the accumulation of evidence at all. Instead, accumulation could be replaced by a simple urgency factor that scales with time. To distinguish between these fundamentally different accounts of decision making, we performed an experiment in which we manipulated the presence, duration, and valence of early evidence. We simulated the associated response time and error rate predictions from the drift diffusion model and the urgency gating model, fitting the models to the empirical data. The drift diffusion model predicted that variations in the evidence presented early in the trial would affect decisions later in that same trial. The urgency gating model predicted that none of these variations would have any effect. The behavioral data showed clear effects of early evidence on the subsequent decisions, in a manner consistent with the drift diffusion model. Our results cannot be explained by the urgency gating model, and they provide support for an evidence accumulation account of perceptual decision making.     

Distress and emotional well-being in breast cancer patients prior to radiotherapy: an expectancy-based model

Understanding precursors to distress and emotional well-being (EWB) experienced in anticipation of radiotherapy would facilitate the ability to intervene with this emotional upset (i.e. higher distress, lower EWB). Thus, this study tested an expectancy-based model for explaining emotional upset in breast cancer patients prior to radiotherapy. Women affected by breast cancer (N?=?106) were recruited and participants completed questionnaires prior to commencing radiotherapy. Structural equation modelling was used to test a cross-sectional model, which assessed the ability of dispositional optimism (Life Orientation Test-Revised – two factors), response expectancies (Visual Analog Scale items), medical (type of surgery, cancer stage and chemotherapy history) and demographic (age, race, ethnicity, education and marital status) variables to predict both EWB (Functional Assessment of Chronic Illness Therapy – Emotional Well-being Subscale) and distress (Profile of Mood States – short version). The model represented a good fit to the data accounting for 65% of the variance in EWB and 69% in distress. Significant predictors of emotional upset were pessimism, response expectancies, Latina ethnicity, cancer stage and having had a mastectomy. These variables explained a large portion of emotional upset experienced prior to radiotherapy for breast cancer and are important to consider when aiming to reduce distress and improve EWB in this context.     

A new perspective on psychological resources: Unanticipated consequences of impulsivity and emotional intelligence

In this study, we sought to understand why people engage in these two forms of voluntary and discretionary behaviours. Expanding upon key resource theories to include individual abilities, we examined the idea of incongruence between resources and behaviours (i.e., resources that have been traditionally framed with a positive tone lead to negative behaviours and resources that have been traditionally framed with a negative tone lead to positive behaviours). Data from 234 employees revealed that impulsivity positively influenced organizational citizenship behaviours, and that emotional intelligence (EI) significantly contributed to deviant workplace behaviours. Post hoc analysis revealed that the ability to perceive emotions was the most influential branch of EI in predicting deviant behaviours. We thus found a non‐compatible view of the individual resources–behaviour relationship, such that ‘positive’ personal resources lead to negative behaviours and ‘negative’ personal resources lead to positive behaviours. Implications for research and practice are discussed.     

Screening for Posttraumatic Stress Disorder: an evaluation of two self-report scales among crime victims

The validity of the Impact of Events Scale (IES) and the Posttraumatic Stress Disorder (PTSD) Symptom Scale, Self-Report version (PSS-SR) was examined among crime victims. Both instruments performed well as screeners for PTSD. For the IES, sensitivity ranged between .93 and 1.00; for the PSS-SR, sensitivity ranged between .80 and .90. Specificity for the IES ranged between .78 and .84 and for the PSS-SR ranged between .84 and .88. Some individual items from the 2 scales performed just as well as the total scales. The authors conclude that either of these short self-report instruments or their individual items are suitable as screeners for PTSD, specifically in settings where mental health professionals are unavailable. Cross-validation of these results is necessary because of the small sample size in this study.     

Protective buffering and psychological distress among couples coping with breast cancer: The moderating role of relationship satisfaction.

This study examined whether the association between protective buffering and psychological distress was moderated by relationship satisfaction. Protective buffering is defined as hiding worries, denying concerns, and yielding to one's partner in an effort to avoid disagreement and reduce one's partner's upset and burden. Two hundred thirty-five women diagnosed with early stage breast cancer and their partners completed measures of protective buffering, psychological distress, and relationship satisfaction at 3 time points over an 18-month period after cancer diagnosis. The authors hypothesized that protective buffering would result in more distress among patients and partners reporting higher relationship satisfaction than among patients and partners reporting lower levels of relationship satisfaction. Patients' protective buffering predicted more distress among patients rating their relationships as more satisfactory, whereas the patients' buffering did not predict distress among patients rating their relationships as less satisfactory. Partner relationship satisfaction also moderated the association between patients' buffering and partners' distress. These findings elucidate conditions under which protective buffering may have detrimental effects.     

Distress and emotional well-being in breast cancer patients prior to radiotherapy: an expectancy-based model

Understanding precursors to distress and emotional well-being (EWB) experienced in anticipation of radiotherapy would facilitate the ability to intervene with this emotional upset (i.e. higher distress, lower EWB). Thus, this study tested an expectancy-based model for explaining emotional upset in breast cancer patients prior to radiotherapy. Women affected by breast cancer (N?=?106) were recruited and participants completed questionnaires prior to commencing radiotherapy. Structural equation modelling was used to test a cross-sectional model, which assessed the ability of dispositional optimism (Life Orientation Test-Revised - two factors), response expectancies (Visual Analog Scale items), medical (type of surgery, cancer stage and chemotherapy history) and demographic (age, race, ethnicity, education and marital status) variables to predict both EWB (Functional Assessment of Chronic Illness Therapy - Emotional Well-being Subscale) and distress (Profile of Mood States - short version). The model represented a good fit to the data accounting for 65% of the variance in EWB and 69% in distress. Significant predictors of emotional upset were pessimism, response expectancies, Latina ethnicity, cancer stage and having had a mastectomy. These variables explained a large portion of emotional upset experienced prior to radiotherapy for breast cancer and are important to consider when aiming to reduce distress and improve EWB in this context.     

Domestic violence and mental health in a Dutch community sample: The adverse role of loneliness

The present study explored whether the adverse mental health consequences of domestic violence victimization vary by type of loneliness (i.e., emotional and social loneliness). Participants were drawn from the Dutch city of Rotterdam (N = 7072). Domestic violence victimization, emotional loneliness and social loneliness were associated with self‐reported mental health. In addition, interaction effects were observed between domestic violence victimization and each type of loneliness. Implications for policy practice as well as strengths and limitations of the study were discussed. Copyright © 2010 John Wiley & Sons, Ltd.     

Transitioning between work and family roles as a function of boundary flexibility and role salience

This study investigates the manner in which people separate their work and family roles and how they manage the boundaries of these two important roles. Specifically, we focus on how role flexibility and salience influence transitions between roles. Results indicate that the ability and willingness to flex a role boundary and role salience are important predictors of transitions between roles. The joint effects of role flexibility and salience on transitions provided interesting results regarding the importance of role boundary flexibility and of the increasing importance attached to the family role. Limitations, suggestions for future research, and implications are discussed.     

Construct validity of the posttraumatic stress disorder checklist in cancer survivors: analyses based on two samples

The measurement of posttraumatic stress disorder (PTSD) is critically important for the identification and treatment of this disorder. The PTSD Checklist (PCL; F. W. Weathers and J. Ford, 1996) is a self-report measure that is increasingly used. In this study, the authors investigated the factorial validity of the PCL with data from 236 cancer survivors who received a bone marrow or stem cell transplantation. The authors examined the fit of these data with the clinical model of 3 symptom clusters for PTSD, as proposed in the Diagnostic and Statistical Manual of Mental Disorders, and alternative models tested in prior research. By using confirmatory factor analysis the authors found that a 4-first-order-factor model of PTSD provided the best fit. The relations of PTSD symptoms with sociodemographic and medical variables were also explored.