What You are Feeling and Why: Two Distinct Types of Emotional Clarity

Individual difference approaches have typically treated emotional clarity (i.e., one’s understanding of one’s own emotions) as a unitary construct. Based on strong theoretical reasons, in this study we explored two related aspects of emotional clarity in a student sample. The first, type awareness, refers to the extent to which people typically can identify and distinguish the types of emotions they experience. The second, source awareness, refers to the extent to which people typically know the causes of their emotions. We psychometrically distinguished self-report items of source and type awareness. Items measuring type awareness were obtained from traditional measures of the construct, clarity of emotions. As no existing measures assess individual differences in source awareness, we developed a set of items with strong face validity. Our results provide initial evidence that one can measure source and type awareness separately.     

A functional neuroimaging analysis of the Trail Making Test-B: implications for clinical application

Recent progress has been made using fMRI as a clinical assessment tool, often employing analogues of traditional "paper and pencil" tests. The Trail Making Test (TMT), popular for years as a neuropsychological exam, has been largely ignored in the realm of neuroimaging, most likely because its physical format and administration does not lend itself to straightforward adaptation as an fMRI paradigm. Likewise, there is relatively more ambiguity about the neural systems associated with this test than many other tests of comparable clinical use. In this study, we describe an fMRI version of Trail Making Test-B (TMTB) that maintains the core functionality of the TMT while optimizing its use for both research and clinical settings. Subjects (N=32) were administered the Functional Trail Making Test-B (f-TMTB). Brain region activations elicited by the f-TMTB were consistent with expectations given by prior TMT neurophysiological studies, including significant activations in the ventral and dorsal visual pathways and the medial pre-supplementary motor area. The f-TMTB was further evaluated for concurrent validity with the traditional TMTB using an additional sample of control subjects (N=100). Together, these results support the f-TMTB as a viable neuroimaging adaptation of the TMT that is optimized to evoke maximally robust fMRI activation with minimal time and equipment requirements.     

The dynamics of choice among multiple alternatives

We consider neurally based models for decision-making in the presence of noisy incoming data. The two-alternative forced-choice task has been extensively studied, and in that case it is known that mutually inhibited leaky integrators in which leakage and inhibition balance can closely approximate a drift-diffusion process that is the continuum limit of the optimal sequential probability ratio test (SPRT). Here we study the performance of neural integrators in n?2 alternative choice tasks and relate them to a multihypothesis sequential probability ratio test (MSPRT) that is asymptotically optimal in the limit of vanishing error rates. While a simple race model can implement this ‘max-vs-next’ MSPRT, it requires an additional computational layer, while absolute threshold crossing tests do not require such a layer. Race models with absolute thresholds perform relatively poorly, but we show that a balanced leaky accumulator model with an absolute crossing criterion can approximate a ‘max-vs-ave’ test that is intermediate in performance between the absolute and max-vs-next tests. We consider free and fixed time response protocols, and show that the resulting mean reaction times under the former and decision times for fixed accuracy under the latter obey versions of Hick's law in the low error rate range, and we interpret this in terms of information gained. Specifically, we derive relationships of the forms log(n-1), log(n), or log(n+1) depending on error rates, signal-to-noise ratio, and the test itself. We focus on linearized models, but also consider nonlinear effects of neural activities (firing rates) that are bounded below and show how they modify Hick's law.     

Social and emotional outcomes of childhood sexual abuse: A review of recent research

A total of 41 articles examined the social and emotional outcomes of childhood sexual abuse. The outcomes examined included suicide and substance use, gang involvement, pregnancy, running away, post-traumatic stress disorder (PTSD), risky sexual behavior, and behavioral problems. Results for each of these outcomes tended to vary by developmental period. However, problems of internalizing and externalizing behavior appeared to be specific to sexually abused children of all age groups. Some studies found differences in outcome according to gender, race, and age. Although findings related to abuse characteristics were found to vary from study to study, severity of the abuse, use of force, and victim's relationship to the perpetrator were found to be especially important. Other factors, such as family support and parental monitoring, were found to mitigate a negative outcome. Limitations are discussed along with suggestions for future research.     

The effect of propensity to trust and perceptions of trustworthiness on trust behaviors in dyads

Research on trust has burgeoned in the last few decades. Despite the growing interest in trust, little is known about trusting behaviors in non-dichotomous trust games. The current study explored propensity to trust, trustworthiness, and trust behaviors in a new computer-mediated trust relevant task. We used multivariate multilevel survival analysis (MMSA) to analyze behaviors across time. Results indicated propensity to trust did not influence trust behaviors. However, trustworthiness perceptions influenced initial trust behaviors and trust behaviors influenced subsequent trustworthiness perceptions. Indeed, behaviors fully mediated the relationship of trustworthiness perceptions over time. The study demonstrated the utility of MMSA and the new trust game, Checkmate, as viable research methods and stimuli for assessing the loci of trust.