Transfer to intermediate forms following concept discrimination by pigeons: chimeras and morphs

Two experiments examined pigeons' generalization to intermediate forms following training of concept discriminations. In Experiment 1, the training stimuli were sets of images of dogs and cats, and the transfer stimuli were head/body chimeras, which humans tend to categorize more readily in terms of the head part rather than the body part. In Experiment 2, the training stimuli were sets of images of heads of dogs and cats, and the intermediate stimuli were computer-generated morphs. In both experiments, pigeons learned the concept discrimination quickly and generalized with some decrement to novel instances of the categories. In both experiments, transfer tests were carried out with intermediate forms generated from both familiar and novel exemplars of the training sets. In Experiment 1, the pigeons' transfer performance, unlike that of human infants exposed to similar stimuli, was best predicted by the body part of the stimulus when the chimeras were formed from familiar exemplars. Spatial frequency analysis of the stimuli showed that the body parts were richer in high spatial frequencies than the head parts, so these data are consistent with the hypothesis that categorization is more dependent on local stimulus features in pigeons than in humans. There was no corresponding trend when the chimeras were formed from novel exemplars. In Experiment 2, when morphs of training stimuli were used, response rates declined smoothly as the proportion of the morph contributed by the positive stimulus fell, although results with morphs of novel stimuli were again less orderly.     

Visual statistical learning in infancy: evidence for a domain general learning mechanism

The rapidity with which infants come to understand language and events in their surroundings has prompted speculation concerning innate knowledge structures that guide language acquisition and object knowledge. Recently, however, evidence has emerged that by 8 months, infants can extract statistical patterns in auditory input that are based on transitional probabilities defining the sequencing of the input's components (Science 274 (1996) 1926). This finding suggests powerful learning mechanisms that are functional in infancy, and raises questions about the domain generality of such mechanisms. We habituated 2-, 5-, and 8-month-old infants to sequences of discrete visual stimuli whose ordering followed a statistically predictable pattern. The infants subsequently viewed the familiar pattern alternating with a novel sequence of identical stimulus components, and exhibited significantly greater interest in the novel sequence at all ages. These results provide support for the likelihood of domain general statistical learning in infancy, and imply that mechanisms designed to detect structure inherent in the environment may play an important role in cognitive development.     

Stroop effects in bilingual translation

In two experiments, bilinguals proficient in English and Spanish translated words from one language to the other. In each experiment, following the target word to be translated, distractor words were presented after a short (200-msec) or long (500-msec) stimulus onset asynchrony. In Experiment 1, the distractor words appeared in the language of production and were related to the meaning or form of the spoken translation. The results replicated past studies in demonstrating that semantically related distractor words produced Stroop-type interference, whereas form-related distractor words produced facilitation. In Experiment 2, the distractors appeared in the language of input and were related to the meaning or form of the target word itself. In contrast to the results of Experiment 1, there were only marginal effects of the distractors on translation performance. These results suggest that language cues related to the nature of the input in translation may serve to reduce competition among lexical competitors during lexicalization. The contrast between these results and those in bilingual picture-word interference studies provides important constraints for models of language production and for claims about the locus of language selection.     

Crossmodal links between audition and touch in covert endogenous spatial attention

We report three experiments designed to investigate the nature of any crossmodal links between audition and touch in sustained endogenous covert spatial attention, using the orthogonal spatial cuing paradigm. Participants discriminated the elevation (up vs. down) of auditory and tactile targets presented to either the left or the right of fixation. In Experiment 1, targets were expected on a particular side in just one modality; the results demonstrated that the participants could spatially shift their attention independently in both audition and touch. Experiment 2 demonstrated that when the participants were informed that targets were more likely to be on one side for both modalities, elevation judgments were faster on that side in both audition and touch. The participants were also able to "split" their auditory and tactile attention, albeit at some cost, when targets in the two modalities were expected on opposite sides. Similar results were also reported in Experiment 3 when participants adopted a crossed-hands posture, thus revealing that crossmodal links in audiotactile attention operate on a representation of space that is updated following posture change. These results are discussed in relation to previous findings regarding crossmodal links in audiovisual and visuotactile covert spatial attentional orienting.     

Localizing Localization: The Role of Working Memory in Auditory Localization

It is unclear from current accounts of working memory which, if any, of its components might be involved in our ability to specify the location of a sound source. A series of studies were performed to assess the degree of interference in localization of broadband noise, by a concurrent articulatory suppression (articulatory loop—Experiment 1), serial recall (phonological store and articulatory loop—Experiment 2), and Paced Visual Serial Addition Test (central executive—Experiment 3). No significant disruption of auditory localization was revealed by the first two experiments, ruling out a role for the phonological loop in auditory localization. In Experiment 3, a large degree of error was exhibited in localization, when performed concurrently with the addition task, indicating a requirement for central resources. This suggestion is confirmed by comparison of localization performance across all three studies, which demonstrates a clear deterioration in performance as the demand of concurrent tasks on central resources increases. Finally, concurrent localization was shown to disrupt the primacy portion of the serial position curve, as well as performance on the Paced Visual Serial Addition Test.     

Language laterality in Navajo reservation children: dichotic test results depend on the language context of the testing

Language lateralization in 40 Navajo and 20 Anglo fifth graders was assessed via the Dichotic Consonant-Vowel Task (DCVT). One group of Navajo children was tested by an experimenter who spoke only Navajo with them. The other Navajo group and the Anglo group were tested by an experimenter who spoke only English to them. Strong right ear advantages (REAs) were obtained for the Anglo group and for the Navajo group tested by the Navajo-speaking experimenter. The Navajo group tested by the English-speaking experimenter showed minimal, nonsignificant REAs. Previous findings of an absence of REAs in Native American children failed to consider the possibility that this might occur only when the experimenter does not speak the dominant language of the children. Our results are not consistent with the view that Native Americans are more right hemisphere dominant as a function of an "appositional" mode of language and thought.     

Emotion Regulation Difficulties Moderate the Association Between Heavy Episodic Drinking and Dating Violence Perpetration Among College Men

Because of high rates of heavy drinking and dating violence (psychological or physical aggression toward a dating partner) among college men, we examined whether emotion regulation difficulties moderated the association between heavy drinking and dating violence perpetration. One hundred and fifty-eight men were recruited from a large northwestern U.S. university between April 2014 and August 2014. Participants completed an online survey that assessed their emotion regulation difficulties as well as their past year history of heavy episodic drinking (HED; consuming 5+ drinks in 2 hr) and dating violence perpetration. Generalized linear models revealed that the positive association between HED and dating violence perpetration was stronger for men with greater impulse control difficulties and for those who reported limited access to emotion regulation strategies. In addition to continued efforts to reduce heavy drinking among college men, interventions targeting emotion regulation difficulties should be incorporated into standard dating violence intervention and prevention efforts to further reduce the likelihood of dating violence perpetration in this population.     

Construct validity of the Sivik Psychosomaticism test and test of Operational style: Correlations with Karolinska Scheme of Personality

To evaluate the construct validity (convergent and divergent) of Sivik Psycho Somaticism test (SPS) and test of Operationality (OPER), Pearson correlation coefficients between SPS scales and subscales and Karolinska Scheme of Personality (KSP) were calculated. Seventy-eight healthy individuals and 196 psychosomatic patients completed the SPS and OPER tests and KSP. The results show that the SPS and OPER subscales are significantly correlated to most KSP subscales. The correlations were higher for the psychosomatic group than for the normal population. The results confirm the validity of the SPS and OPER constructs.     

Multiple theoretical approaches to supervision: choices in family therapy training

The supervision techniques used in structural, strategic, family-of-origin, and experiential family therapy training are discussed and compared, with emphasis on the isomorphism between supervision and therapy in each school. The usefulness of each supervisory model is related to supervisees' needs at different levels of training. Recommendations are made about the sequence of family therapy training, including the utility of eclectic versus purist family therapy training programs for trainees at different levels of experience.