Cognitive Remediation as an Adjunct Treatment for Substance Use Disorders: A Systematic Review

Neuropsychology Review - Substance use disorders are associated with diverse neuropsychological impairments, with deficits in memory and executive functioning commonly observed. Cognitive...     

Optimal control strategies under different feedback schedules: kinematic evidence

Two experiments were conducted in which participants (N = 12, Experiment 1; N = 12, Experiment 2) performed rapid aiming movements with and without visual feedback under blocked, random, and alternating feedback schedules. Prior knowledge of whether vision would be available had a significant impact on the strategies that participants adopted. When they knew that vision would be available, less time was spent preparing movements before movement initiation. Participants also reached peak deceleration sooner but spent more time after peak deceleration adjusting limb trajectories. Consistent with those findings, analysis of spatial variability at different points in the trajectory indicated that variability increased up to peak deceleration but then decreased from peak deceleration to the end of the movement.     

Syllogistic reasoning time: Disconfirmation disconfirmed

University of Saskatchewan, Saskatoon, Saskatchewan, Canada Models of deductive reasoning typically assume that reasoners dedicate more logical analysis to unbelievable conclusions than to believable ones (e.g., Evans, Newstead, Allen, & Pollard, 1994; Newstead, Pollard, Evans, & Allen, 1992). When the conclusion is believable, reasoners are assumed to accept it without much further thought, but when it is unbelievable, they are assumed to analyze the conclusion, presumably in an attempt to disconfirm it. This disconfirmation hypothesis leads to two predictions, which were tested in the present experiment: Reasoners should take longer to reason about problems leading to unbelievable conclusions, and reasoners should consider more models or representations of premise information for unbelievable conclusions than for believable ones. Neither prediction was supported by our data. Indeed, we observed that reasoners took significantly longer to reason about believable conclusions than about unbelievable ones and generated the same number of representations regardless of the believability of the premises. We propose a model, based on a modified version of verbal reasoning theory (Polk & Newell, 1995), that does not depend on the disconfirmation assumption.     

Lexical-gustatory synaesthesia: linguistic and conceptual factors

This study documents an unusual case of developmental synaesthesia, in which speech sounds induce an involuntary sensation of taste that is subjectively located in the mouth. JIW shows a highly structured, non-random relationship between particular combinations of phonemes (rather than graphemes) and the resultant taste, and this is influenced by a number of fine-grained phonemic properties (e.g. allophony, phoneme ordering). The synaesthesia is not found for environmental sounds. The synaesthesia, in its current form, is likely to have originated during vocabulary acquisition, since it is guided by learned linguistic and conceptual knowledge. The phonemes that trigger a given taste tend to also appear in the name of the corresponding foodstuff (e.g. /I/, /n/ and /s/ can trigger a taste of mince /mIns/) and there is often a semantic association between the triggering word and taste (e.g. the word blue tastes "inky"). The results suggest that synaesthesia does not simply reflect innate connections from one perceptual system to another, but that it can be mediated and/or influenced by a symbolic/conceptual level of representation.     

Interest in and barriers to participation in multiple family groups among head and neck cancer survivors and their primary family caregivers

This study examined interest in and barriers to participation in a multiple family group intervention (MFG) for adult cancer survivors and their family caregivers. The intervention was developed to assist families in coping with the persistent challenges of cancer diagnosis, treatment, and rehabilitation. Eighty eligible families having a member diagnosed and treated for cancers of the head and neck region completed a baseline quality of life survey consisting of standardized psychosocial measures, and then all patients and their families were invited to participate in a day-long multiple family group program. However, despite extensive recruitment efforts and accommodations to address anticipated barriers for nonparticipation, only 15 of the 80 (19%) eligible families agreed to attend the MFG workshop. Post-MFG, participating families reported high levels of program satisfaction and usefulness. These findings are discussed in the context of increasing the use of family-focused interventions in cancer care settings.     

Traces of Terror: Subliminal Death Primes and Facial Electromyographic Indices of Affect

Previous research has found that both explicit and implicit reminders of one's mortality provoke hostile reactions to those who threaten one's worldview, but do not create conscious negative affect or electrodermal arousal. This study was conducted to investigate subtle affective reactions to subliminal death primes as indexed by measures of facial electromyography (EMG). Fifty-four participants were exposed to masked presentations of either the word dead or pain, and then to a worldview threatening essay. Facial EMG was recorded throughout. Analyses found the expected increase in worldview defense following mortality primes. Analyses also uncovered a novel finding with greater corrugator EMG specifically during exposure to the subliminal death but not subliminal pain primes, pointing to the sensitivity of facial EMG to unconscious cognition. However, there was little evidence for a mediating role of affect on worldview defense following exposure to death primes. Implications for understanding terror management processes and the effects of unconscious cognition on emotion are briefly discussed.