Constraints on using the dual-task methodology to specify the degree of central executive involvement in cognitive tasks

The dual-task paradigm has been used to examine the role of the central executive in various cognitive tasks. In these studies, performance decrements in primary cognitive tasks performed concurrently with secondary executive tasks have been interpreted as evidence for the involvement of the central executive in those primary tasks. In the present study, we examined the effects of different secondary tasks on performance of three psychometric visuospatial tasks. The decrement in performance of these tasks when they were paired with secondary executive tasks was smallest for the psychometric task considered to most heavily involve the central executive and largest for the task considered least demanding of executive mechanisms. We propose that, when applied to the assessment of central executive involvement, the prevalent simple dual-task logic does not always apply. Special conditions that limit the application of the dual-task methodology include two inherently related factors--a response selection bottleneck and a strategic tradeoff between primary and secondary tasks.     

Visual routines for extracting magnitude relations

Linking relations described in text with relations in visualizations is often difficult. We used eye tracking to measure the optimal way to extract such relations in graphs, college students, and young children (6- and 8-year-olds). Participants compared relational statements (“Are there more blueberries than oranges?”) with simple graphs, and two systematic patterns emerged: eye movements that followed the verbal order of the question (inspecting the “blueberry” value first) versus those that followed a left-first bias (regardless of the left value’s identity). Question-order patterns led substantially to faster responses and increased in prevalence with age, whereas the left-first pattern led to far slower responses and was the dominant strategy for younger children. We argue that the optimal way to verify a verbally expressed relation’s consistency with visualization is for the eyes to mimic the verbal ordering but that this strategy requires executive control and coordination with language.     

Simple visual reaction time,personality and strength of the nervous system: A signal-detection theory approach

Eysenck (1967) has reviewed evidence which suggests that introverts have a higher level of arousal than extraverts. Moreover, Gray (1967) has proposed that introverts have weak nervous systems, in the Russian terminology. Studies of simple reaction time such as that of Mangan and Farmer (1967) have posed problems for these views, but it is suggested that this may have been due to criterion differences between introverts and extraverts. In the present study a simple visual reaction-time task and a signal-detection task were conducted side by side. No significant differences between introverts and extraverts were found in measures of strength derived from the former, or measures of criterion derived from the latter. However, high N Ss were found to have a significantly lower value for Nebylitsyn's index of the slope of the reaction time/stimulus intensity function, thus supporting the view that high N Ss have relatively weak nervous systems.     

Point biserial correlation coefficient and its generalization

The problem of measuring the association between two characters, one quantitative and the other qualitative, is discussed. The formula for the large sample standard error of the point biserial correlation coefficient under general conditions is derived. The point multiserial correlation coefficient is introduced and some of its properties are examined. Tests of different hypotheses appropriate to these types of problems are formulated.I wish to pay my sincerest thanks to Dr. C. R. Rao, Dr. S. K. Mitra, and the reviewers for their valuable suggestions.     

Underlying Cognitions in Gambling Behavior Among University Students1

Differences in underlying cognitions across gambling tasks were examined. The South Oaks Gambling Screen, a measure of pathological gambling, was completed by 60 undergraduate students. They also played computer‐simulated games of roulette, slots, and blackjack in a laboratory setting. The “think‐aloud” procedure was used to reveal subjects' cognitions, which were subsequently categorized into cognitive heuristics. Individuals were classified as social gamblers with and without problems and probable pathological gamblers. Results reveal that certain heuristics, including references to an explanation of their losses, hindsight bias, personification of the dealer/machine, chasing behavior, and past experiences were most frequently endorsed by probable pathological gamblers. Empirical evidence supports that probable pathological gamblers are qualitatively different from social gamblers in their emitted verbalized cognitive heuristics.     

Effect of schizotypy on responding maintained by free-operant schedules of reinforcement

Deviations from otherwise reliable patterns of responding in human performance on schedules of reinforcement could be associated with personality characteristics, such as psychometrically-measured schizotypy. The present study examined differences between high and low scorers on four schizotypy subscales (unusual experiences, cognitive disorganisation, introvertive anhedonia and impulsive non-conformity) on a random-ratio (RR) and random-interval (RI) schedule of reinforcement. Results showed a higher rate of responding on the RR than RI schedule, consistent with the differences in performance normally observed between these schedules. However, these differences were dependant on whether or not participants scored high or low on the schizotypy subscales, as well as the specific schedule parameters between the schedules. Specifically, high scorers on the unusual experiences (UE) subscale of the O-LIFE(B) were the only group in Experiment 1 not to show a difference in schedule performance, suggesting high scores on this subscale are linked to altered RR and RI performance. Experiment 2 explored this finding further using different schedule parameters, and confirmed that high scorers in UE did not differ in response rates between the two schedules.     

Internalized Misogyny as a Moderator of the Link between Sexist Events and Women’s Psychological Distress

This study examined the relationship between internalized misogyny and two other forms of internalized sexism, self-objectification and passive acceptance of traditional gender roles. In addition, it examined the moderating role of internalized misogyny in the link between sexist events and psychological distress. Participants consisted of 274 heterosexual women who were recruited at a large southern university in the United States and completed an online survey. Results indicated that internalized misogyny was related to, but conceptually distinct from self-objectification and passive acceptance. Findings also indicated that greater experiences of sexist events were associated with higher levels of psychological distress. In addition, internalized misogyny intensified the relationship between external sexism and psychological distress.     

Neuromarketing in predicting voting behavior: A case of National elections in India

Political choice has huge importance, either expressed in the balloting place or in the exit poll, in bringing a political party to power and thus impacting the economy and society's welfare. Research in leadership and decision-making suggests that the physical characteristics and traits of an individual influence the consumer's trustworthiness. Despite being a less explored research area, studying the impact of specific verbal and non-verbal cues of a political leader through a technological lens, such as eye-tracking has been sparsely talked about. Three sets of experiments were conducted to study voters' visual attention and reactions to gage their willingness to vote. First, an eye-tracking tool was used to record the visual attention and regions of interest (ROI) of voters. Subsequently, a short survey was used to analyze the “willingness to vote”, followed by a pilot study on their attention to non-verbal cues from the candidate. Also, a sentiment analysis of the voters was gathered from social media platforms. The present study analyzed the non-verbal aspects of a political leader with regard to voting intention and found that even a few of the non-verbal cues have an influence on the willingness to vote for a candidate. The findings contribute to the literature of neuro-politics and decision-making by analyzing voters' experiences of two political leaders, Narendra Modi (NaMo) and Rahul Gandhi (RaGa) based on non-verbal cues. Political parties and candidates should focus on non-verbal cues to increase their chances of winning elections. In addition, practitioners from the industry should incorporate appropriate non-verbal cues while designing ad campaigns, personal branding, PR campaigns, and CEO addresses.