Comparative judgments of symbolic and non-symbolic stimuli yield different patterns of reaction times

Are different magnitudes, such as Arabic numerals, length and area, processed by the same system? Answering this question can shed light on the building blocks of our mathematical abilities. A shared representation theory suggested that discriminability of all magnitudes complies with Weber's law. The current work examined this suggestion. We employed comparative judgment tasks to investigate different types of comparisons — conceptual comparison of numbers, physical comparison of numbers and physical comparison of different shapes. We used 8 different size ratios and plotted reaction time as a function of these ratios. Our findings suggest that the relationship between discriminability and size ratio is not always linear, as previously suggested; rather, it is modulated by the type of comparison and the type of stimuli. Hence, we suggest that the representation of magnitude is not as rigid as previously suggested; it changes as a function of task demands and familiarity with the compared stimuli.     

The Gettier Intuition from South America to Asia

Journal of Indian Council of Philosophical Research - This article examines whether people share the Gettier intuition (viz. that someone who has a true justified belief that p may nonetheless fail...     

(Re)presenting: Muslims on North American television

This article describes and analyzes the portrayal of Muslims on several North American television shows. Greatest detail is given to the two seasons of Sleeper Cell, the first show on American television created to deal with Muslim lives post 9/11. I deal briefly with Muslim characters on Oz for a look at portrayals of Muslim life pre 9/11. I also mention Muslim characters in Lost and 24 as well as some films to add further insights to my argument. These television dramas are compared with two comedies, Aliens in America as well as Little Mosque on the Prairie, the first Canadian television show to examine Muslim lives. The conclusion is that in dramas, Muslims are not recognized on American television as citizens of their own country, but instead are portrayed as dangerous immigrants with a religion that is both alien and wicked. Moreover, the religion as it is lived out on the television drama is one of violence—there seems to be no other substantive practice that embodies Islamic faith. The case is very different with regard to the television comedy.     

Optimal response vigor and choice under non-stationary outcome values

Psychonomic Bulletin & Review - Within a rational framework, a decision-maker selects actions based on the reward-maximization principle, which stipulates that they acquire outcomes with the...     

High involvement HR systems and innovative work behaviour: the mediating role of psychological empowerment,and the moderating roles of manager and co-worker support

Employees’ innovative work behaviour can help firms’ competitiveness. Existing research focuses on several factors, including HR policies, psychological empowerment as well as manager and co-worker support, to explain innovative work behaviour. However, much of this literature analyses just one of these, neglecting how they interact and limiting our understanding of the causes of innovative work behaviour. Synthesizing this work, we develop a novel and holistic framework that examines 1) how high-involvement HR systems are linked via the mediating role of psychological empowerment to innovative work behaviour and 2) how both manager and co-worker support moderate this relationship. Analysing software companies in Pakistan, we use hierarchical linear modelling to assess this framework. We draw on a unique dataset that captures HR policies at the organizational level as well as management and co-worker support, and supervisors’ assessments of individuals’ innovative work behaviour at the individual level. We analyse specific groups of HR practices. Psychological empowerment mediates the relationship between high-involvement HR systems and employees’ innovative work behaviour. Manager and co-worker support moderate the relationship between psychological empowerment and innovative work behaviour. Motivation-enhancing HR practices have a direct effect on innovative work behaviour, whereas ability- and opportunity-enhancing ones are mediated by psychological empowerment.     

Anxiety sensitivity and auditory perception of heartbeat

Anxiety sensitivity (AS) is the fear of sensations associated with autonomic arousal. AS has been associated with the development and maintenance of panic disorder. Given that panic patients often rate cardiac symptoms as the most fear-provoking feature of a panic attack, AS individuals may be especially responsive to cardiac stimuli. Consequently, we developed a signal-in-white-noise detection paradigm to examine the strategies that high and low AS individuals use to detect and discriminate normal and abnormal heartbeat sounds. Compared to low AS individuals, high AS individuals demonstrated a greater propensity to report the presence of normal, but not abnormal, heartbeat sounds. High and low AS individuals did not differ in their ability to perceive normal heartbeat sounds against a background of white noise; however, high AS individuals consistently demonstrated lower ability to discriminate abnormal heartbeats from background noise and between abnormal and normal heartbeats. AS was characterized by an elevated false alarm rate across all tasks. These results suggest that heartbeat sounds may be fear-relevant cues for AS individuals, and may affect their attention and perception in tasks involving threat signals.     

Culture and Gender Representation in Iranian School Textbooks

This study examines the representations of male and female social actors in selected Iranian EFL (English as a Foreign Language) textbooks. It is grounded in Critical Discourse Analysis and uses van Leeuwen’s Social Actor Network Model to analyze social actor representations in the gendered discourses of compulsory heterosexuality. Findings from the analysis show that the representations endorse the discourse of compulsory heterosexuality which is an institutionalized form of social practice in Iran. Three male and three female students were interviewed to find out what they think about these representations. Their responses with regard to whether they think textbooks should also include representations of other forms of sexuality were non-committal and vague. To them LGBT people are the “Other” practicing a form of sexuality that is not normal. Such exclusions could obscure the reality regarding the existence of such gender identities and represent the world in a particular manner.     

Automatic avoidance tendencies in individuals with contamination-related obsessive-compulsive symptoms

We used an approach-avoidance task (AAT) to examine response to threatening stimuli in 20 individuals high in contamination-related obsessive-compulsive symptoms (HCs) and 21 individuals low in contamination-related obsessive-compulsive symptoms (LCs). Participants were instructed to respond to contamination-related and neutral pictures by pulling a joystick towards themselves or by pushing it away from themselves. Moving the joystick changed the size of the image to simulate approaching or distancing oneself from the object. Consistent with our hypothesis, the HC group was significantly slower in pulling contamination-related pictures than in pulling neutral pictures, whereas in the LC group there was no difference between speed of pulling contamination-related pictures and neutral pictures. Contrary to our hypothesis, we did not find support for faster pushing away of contamination-related pictures than neutral pictures by the HC group. Moreover, the degree of avoidance of contamination-related stimuli when pulling - but not when pushing - was significantly correlated with self-reported contamination-related obsessive-compulsive symptoms. These results suggest a biased behavioral response for threatening objects in individuals high in contamination fears only when inhibiting the prepotent response to avoid threatening stimuli and not when performing a practiced avoidance response. Thus, our results validate the use of the AAT as a measure of inhibited and uninhibited automatic avoidance reactions to emotional information in individuals with contamination-related obsessive-compulsive symptoms.     

Critical flicker frequency under monocular and binocular conditions.

Critical flicker frequency of 40 undergraduate students, 20 men and 20 women whose mean age was 19.3 yr., was measured under monocular and binocular viewing conditions, using the Lafayette Visual Perception Control with Display Unit. Half of the subjects received monocular treatment first and binocular treatment second, and the other half received the treatments in the reversed order. A 2-min. rest was allowed between these treatments. Analysis shows that mean CFF under the monocular condition was significantly lower than that under binocular conditions. The findings were discussed in terms of visual constraint and eye strain and fatigue under the monocular viewing condition.     

A case series of attention modification in clinically anxious youths

Research in the last fifteen years suggests that anxious individuals selectively attend towards threatening information. Attention modification interventions for internalizing adults have been developed to target cognition at this basic level; these programs have demonstrated initial efficacy in attention bias and anxiety symptom reduction. To date, there have been no published studies of attention modification in youths with clinical levels of anxiety. The current case series examined the initial efficacy of a four-week (12 sessions) attention modification program (AMP) designed to train attention away from threat in 16 children and adolescents (ages 10 to 17) diagnosed with DSM-IV anxiety disorders. Overall, youths experienced a significant decrease in anxiety and depression symptoms, and 12 of 16 youths no longer met criteria for any anxiety diagnosis at post-treatment. AMP was feasible with youths, and all youths and parents deemed the program acceptable. These findings provide support for further research on the use of cognitive bias modification interventions with clinically anxious youths.