Average size perception and the allure of a new mechanism

In this brief response to commentaries by Ariely (2008) and Chong, Joo, Emmanouil, and Treisman (2008) on our earlier article, we highlight the two key assumptions underlying earlier claims about statistical summary representations of object size and argue that existing studies have not met either of them. We note why statistical summary representations of size are different from such representations of motion or orientation, and we emphasize the need for simulations of performance to exclude focused attention explanations for judgments of average size.     

Time course of selective attention in clinically depressed young adults: an eye tracking study

Depressed individuals display biased attention for emotional information when stimuli are presented for relatively “long” (e.g., 1 s) durations. The current study examined whether attentional biases are sustained over a much longer period. Specifically, clinically depressed and never depressed young adults simultaneously viewed images from four emotion categories (sad, threat, positive, neutral) for 30 s while line of visual gaze was assessed. Depressed individuals spent significantly more time viewing dysphoric images and less time viewing positive images than their never depressed counterparts. Time course analyses indicated that these biases were maintained over the course of the trial. Results suggest that depressed participants' attentional biases for dysphoric information are sustained for relatively long periods even when other emotional stimuli are present. Mood congruent information-processing biases appear to be a robust feature of depression and may have an important role in the maintenance of the disorder.     

Reliability and Validity of the Gamblers Anonymous Twenty Questions

One of the earliest instruments to screen for problem gambling, the Twenty Questions (20Q), was developed within Gamblers Anonymous. This instrument has not received serious research attention, however, and its psychometric properties are generally unknown. This study reports reliability and validity data for this instrument in 3 independent samples totaling 456 participants: two samples of problem gamblers in treatment and a non-treatment sample of problem gamblers. The Twenty Questions was shown to possess high reliability as measured by Cronbach’s alpha. Concurrent, convergent and predictive validity of the 20Q supported the use of this instrument as an acceptable screening instrument. Classification analyses indicated that the 20Q is comparable to the DSM-IV diagnostic criteria for pathological gambling in specificity, sensitivity and rates of false negatives and false positives. The 20Q appears to be a reliable and valid measure of problem gambling and warrants continued research attention.     

From Contracts to Capabilities and Back Again

It has been common for researchers and commentators within the discipline of Social and Public Policy to evoke Rawlsian theories of justice. Yet some now argue that the contractualist tradition cannot adequately incorporate, or account for, relations of care, respect and interdependency. Though contractualism has its flaws this article proposes that we should not reject it. Through a critique of one of its most esteemed critics, Martha Nussbaum, it proposes that contractualism can be defended against the capabilities approach she prefers. The article concludes by suggesting how and why the moral philosophy of Thomas Scanlon offers a basis for reconciling the strengths of a contractualist, egalitarian liberalism with those of Nussbaum’s capabilities approach.

Graduate employment status and health: a longitudinal analysis of the transition from student

The prevalence of unemployment and underemployment was explored longitudinally in 248 recent graduates (73 males and 175 females) over an 18–24 month transition from final year student to 9–12 months post-graduation. Over this period changes in levels of psychological distress, health behaviours, social support, optimism and achievement motivation were measured. Results show that both unemployment and underemployment have deleterious effects on psychological and physical health, social support, optimism and achievement motivation.

Better than average: alternatives to statistical summary representations for rapid judgments of average size

People can perceive the individual features of an object by focusing attention on it and binding the features together at a location. Some perceptual processing can occur without focusing attention on each object, though; people may even be able to extract summary information about the sizes of all the objects in a display, essentially computing the mean size at a glance. Evidence that people can judge the mean size of an array efficiently and accurately has been used to support the strong claim that people use a global, parallel process to extract a statistical summary of the average size of the objects in the display. Such claims are based both on the accuracy of performance and on the supposition that performance exceeds what would be possible with serial, focused attention. However, these studies typically have not examined the limits of performance with focused-attention strategies. Through experiments and simulations, we show that existing evidence for mean size perception can be explained through various focused-attention strategies, without appealing to a new mechanism of average size perception. Although our evidence does not eliminate the possibility that people do perceive the average size of all the objects in a display, it suggests that simpler mechanisms can accommodate the existing data.     

Automatic measurement of propositional idea density from part-of-speech tagging

The Computerized Propositional Idea Density Rater (CPIDR, pronounced "spider") is a computer program that determines the propositional idea density (P-density) of an English text automatically on the basis of part-of-speech tags. The key idea is that propositions correspond roughly to verbs, adjectives, adverbs, prepositions, and conjunctions. After tagging the parts of speech using MontyLingua (Liu, 2004), CPIDR applies numerous rules to adjust the count, such as combining auxiliary verbs with the main verb. A "speech mode" is provided in which CPIDR rejects repetitions and a wider range of fillers. CPIDR is a user-friendly Windows .NET application distributed as open-source freeware under GPL. Tested against human raters, it agrees with the consensus of two human raters better than the team of five raters agree with each other [r(80) = .97 vs. r(10) = .82, respectively].     

Thanks for being,loving, and believing

Philosophical Studies - Gratitude to others is typically understood as a response to good things people give to us or do for us. Occasionally, though, we thank people for things other than gifts or...     

Attention attenuates metacontrast masking

The influence of attention on perceptual awareness was examined using metacontrast masking. Attention was manipulated with endogenous cues to assess the effects on the temporal and spatial parameters of target visibility. Experiment 1 examined the time course of effective masking when the target and mask set were presented at an attended vs. an unattended location. The valid allocation of attention decreased the magnitude of the masking effect (i.e. increased visibility) for approximately 80 ms. Furthermore, even with spatial displacements of the target and mask and center-to-center separations of 1.5 degrees or 2.7 degrees of visual angle (Experiment 2), target visibility was increased when attention was validly allocated. These results indicate that attention influences low-level visual processes to enhance visual awareness.