Estimating Difficulty from Polytomous Categorical Data

A comprehensive analysis of difficulty for multiple-choice items requires information at different levels: the test, the items, and the alternatives. This paper introduces a new parameterization of the nominal categories model (NCM) for analyzing difficulty at these three levels. The new parameterization is referred to as the NE–NCM and is statistically equivalent to the NCM. The NE–NCM is applied to a sample of responses from a logical analysis test. The results suggest that the individuals execute a self-terminated response process that is mostly determined by working memory load.     

Types of semantic category and stimulus modality in procedural learning: implications for models of semantic memory

The present work attempts to determine whether procedural learning of a semantic categorisation task is influenced by the type of semantic category of the stimuli (biological and non-biological elements). It is also an attempt to determine the effect of the stimulus presentation modality on the categorisation task. A semantic categorisation task (4 series of 40 stimuli) was administered to 256 participants (128 classifying pictures, and 128 classifying words). Biological categories were responded to faster than non-biological ones although there were no significant differences between the interaction of the category type and the stimulus presentation modality. Reaction times progressively decreased with practice. However, the initial differences disappeared when subjects were trained. The way that current models account for these investigation findings is discussed. In addition, it is suggested that there is an attentional bias in favor of biological elements, which disappears when presumably less relevant elements become more relevant as a function of the task characteristics.     

Development of aptitude at altitude

Millions of people currently live at altitudes in excess of 2500 metres, where oxygen supply is limited, but very little is known about the development of brain and behavioural function under such hypoxic conditions. We describe the physiological, cognitive and behavioural profile of a large cohort of infants (6–12 months), children (6–10 years) and adolescents (13–16 years) who were born and are living at three altitude locations in Bolivia (～500 m, ～2500 m and ～3700 m). Level of haemoglobin oxygen saturation and end‐tidal carbon dioxide were significantly lower in all age groups living above 2500 metres, confirming the presence of hypoxia and hypocapnia, but without any detectable detriment to health. Infant measures of neurodevelopment and behaviour yielded comparable results across altitude groups. Neuropsychological assessment in children and adolescent groups indicated a minor reduction in psychomotor speed with increasing altitude, with no effect of age. This may result from slowing of underlying brain activity in parallel with reduced cerebral metabolism and blood flow, evidenced here by reduced cerebral blood flow velocity, particularly in the basilar artery, in children and adolescents. The proportion of European, Native American and African genetic admixture was comparable across altitude groups, suggesting that adaptation to high altitude in these children occurred in response to chronic hypoxic exposure irrespective of ethnic origin. Thus, psychomotor slowing is proposed to be an adaptive rather than a deficient trait, perhaps enabling accuracy of mental activity in hypoxic conditions.     

The mediation effects of achievement motivation and locus of control between academic stress and life satisfaction in undergraduate students

This study investigated the mediation effect of locus of control and achievement motivation between academic stress and life satisfaction. A total of 307 undergraduate students recruited from a Hispanic Serving Institution in South Texas participated in the study. In the frame of the study, two mediation models were tested by utilising PROCESS Procedure for SPSS (Hayes, 2013. Introduction to mediation, moderation, and conditional process analysis: A regression-based approach. New York, NY: Guilford Press). The results indicated that bivariate correlations among study variables ranged from ?.24 to .32. The overall composite indicated that academic stress contributed to 6% of the variance in life satisfaction (p?b?=??.06), while the mediating effect of locus of control contributed to 10% of the variance in Life Satisfaction (p?b?=??.4).     

Effects of Stimulus Dimension on the Emergence of Transitivity Relations

The Psychological Record - The effect of stimuli dimension was assessed on the emergence of transitivity relations by the use of a go/no go procedure and the training of identity relations. Four...     

An Analysis of Extinction-Cue Features in the Reduction of Operant Behavior Relapse

The Psychological Record - The present free operant conditioning experiments with rats examined the impact of manipulating different traits of an extinction-cue on ABA renewal. All rats were...     

Do adolescents want death to be included in their education?

Social Psychology of Education - This study sets out to ascertain adolescents’ attitudes and opinions towards death education. To this end two instruments were designed and validated: the...     

Recommending beauty: semantics and pragmatics of aesthetic predicates

The paper offers a semantic and pragmatic analysis of statements of the form ‘x is beautiful’ as involving a double speech act: first, a report that x is beautiful relative to the speaker’s aesthetic standard, along the lines of naive contextualism; second, the speaker’s recommendation that her audience comes to share her appraisal of x as beautiful. We suggest that attributions of beauty tend to convey such a recommendation due to the role that aesthetic practices play in fostering and enhancing interpersonal coordination. Aesthetic practices are driven by a disposition towards the attunement of attitudes and aesthetic recommendations contribute to forwarding such attunement. Our view is motivated by an attempt to satisfy the following set of desiderata: to account for (i) the experiential nature of aesthetic judgments, (ii) disagreements in aesthetic debates, and (iii) the normative aspirations of aesthetic discourse, as well as to avoid appealing to (iv) error theory and (v) realist ontological commitments.     

A set of high quality colour images with Spanish norms for seven relevant psycholinguistic variables: the Nombela naming test

This paper presents a new corpus of 140 high quality colour images belonging to 14 subcategories and covering a range of naming difficulty. One hundred and six Spanish speakers named the items and provided data for several psycholinguistic variables: age of acquisition, familiarity, manipulability, name agreement, typicality and visual complexity. Furthermore, we also present lexical frequency data derived internet search hits. Apart from the large number of variables evaluated, these stimuli present an important advantage with respect to other comparable image corpora in so far as naming performance in healthy individuals is less prone to ceiling effect problems. Reliability and validity indexes showed that our items display similar psycholinguistic characteristics to those of other corpora. In sum, this set of ecologically valid stimuli provides a useful tool for scientists engaged in cognitive and neuroscience-based research.     

Masked transposition effects for simple versus complex nonalphanumeric objects

When two letters/digits/symbols are switched in a string (e.g., jugde–judge; 1492–1942; *?When two letters/digits/symbols are switched in a string (e.g., jugde-judge; 1492-1942; *?$&-*$?&), the resulting strings are perceptually similar to each other and produce a sizable masked transposition priming effect with the masked priming same-different matching task. However, a parallel effect does not occur for strings of pseudoletters (e.g., [letters in the text]); García-Orza, Perea, & Mu?oz, Quarterly Journal of Experimental Psychology, 63, 1603-1618, 2010). In the present study, we examined whether masked transposition priming is specific to alphanumeric stimuli or whether it also occurs with strings composed of other "objects"-namely, line drawings of common objects (Experiment 1) and geometrical shapes (Experiment 2). Results showed a significant masked transposition priming effect for geometrical shapes (e.g., [geometrical shapes in the text]), but not for line drawings of common objects (e.g., [symbols in the text]). These findings suggest that the mechanism involved in the coding of position in masked priming works only with perceptually simple, familiar "objects" (i.e., letters, numbers, symbols, or geometrical shapes), once their identities have been well ascertained.