Look-normal: the colonized child of developmental science

This article provides an analysis of the techniques, methods, materials, and discourses of child study observation to illuminate its role in the sociohistorical colonization of childhood. Through analysis of key texts it explains how early 20th-century child study provided for the transcendence of historical, racial, and social contexts for understanding human development. The colonizing project of child study promoted the advancement of Eurocentric culture through a generic "White" development. What a child is and can be, and the meaning of childhood has been disembodied through observation, record keeping, and analytical processes in which time and space are abstracted from behavior, and development symbolized as a universal ideal.     

Semantics boosts syntax in artificial grammar learning tasks with recursion

Center-embedded recursion (CER) in natural language is exemplified by sentences such as "The malt that the rat ate lay in the house." Parsing center-embedded structures is in the focus of attention because this could be one of the cognitive capacities that make humans distinct from all other animals. The ability to parse CER is usually tested by means of artificial grammar learning (AGL) tasks, during which participants have to infer the rule from a set of artificial sentences. One of the surprising results of previous AGL experiments is that learning CER is not as easy as had been thought. We hypothesized that because artificial sentences lack semantic content, semantics could help humans learn the syntax of center-embedded sentences. To test this, we composed sentences from 4 vocabularies of different degrees of semantic content due to 3 factors (familiarity, meaning of words, and semantic relationship between words). According to our results, these factors have no effect one by one but they make learning significantly faster when combined. This leads to the assumption that there were different mechanisms at work when CER was parsed in natural and in artificial languages. This finding questions the suitability of AGL tasks with artificial vocabularies for studying the learning and processing of linguistic CER.     

If I want you to like me,should I be like you or unlike you? The effect of prior positive interaction with the group on conformity and distinctiveness in consumer decision making

The extant research points to conflicting results regarding social influence in consumer decision making. On the one hand, there is empirical evidence that suggests that people conform to other members of their groups. On the other hand, several studies demonstrated the opposite pattern, namely, that individuals seek distinctiveness from others in the group. The goal of the present research is to reconcile these contradictory findings. To this end, I propose that whether a person will conform to or seek distinctiveness from others in a particular consumption situation is contingent on the absence or presence of one's prior positive interaction with the group. I also suggest that this effect will occur in a public context, that is, when an individual's choice is visible to other group members. The results of experiment supported these propositions. Copyright © 2012 John Wiley & Sons, Ltd.     

The Effect of Alcohol on Speech Production

The present study investigates the effect of acute alcohol consumption on speech in Hungarian subjects. The measures used to reveal these effects were tongue-twisters, which were grouped according to their linguistic features. The number and type of speech errors while uttering the tongue-twisters were compared between intoxicated and sober conditions. The results showed that subjects made more speech errors in alcohol influenced than in sober states in all types of the tongue-twisters except for those using foreign words. Changes in the articulation rate, number of pauses and fundamental frequency were investigated as well. In the intoxicated state, no changes were observed in fundamental frequency and articulation rate, while the number of pauses increased.     

Detection and Identification of Change in Naturalistic Scenes

Research using change detection paradigms has demonstrated that only limited scene information remains available for conscious report following initial inspection of a scene. Previous researchers have found higher change identification rates for deletions of parts of objects in line drawings of scenes than additions. Other researchers, however, have found an asymmetry in the opposite direction for addition/deletion of whole objects in line drawings of scenes. Experiment 1 investigated subjects' accuracy in detecting and identifying changes made to successive views of high quality photographs of naturalistic scenes that involved the addition and deletion of objects, colour changes to objects, and changes to the spatial location of objects. Identification accuracy for deletions from scenes was highest, with lower identification rates for object additions and colour changes, and the lowest rates for identification of location changes. Data further suggested that change identification rates for the presence/absence of objects were a function of the number of identical items present in the scene. Experiment 2 examined this possibility further, and also investigated whether the higher identification rates for deletions found in Experiment 1 were found for changes involving whole objects or parts of objects. Results showed higher identification rates for deletions, but only where a unique object was deleted from a scene. The presence of an identical object in the scene abolished this deletion identification advantage. Results further showed that the deletion/addition asymmetry occurs both when the objects are parts of a larger object and when they are entire objects in the scene.     

Repetition blindness for novel objects

When visual stimuli (letters, words or pictures of objects) are presented sequentially at high rates (8–12 items/s), observers have difficulty in detecting and reporting both occurrences of a repeated item: This is repetition blindness. Two experiments investigated the effects of repetition of novel objects, and whether the representations bound to episodic memory tokens that yield repetition blindness are viewpoint dependent or whether they are object centred. Subjects were shown coloured drawings of simple three‐dimensional novel objects, and rate of presentation (Experiment 1) and rotation in depth (Experiment 2) were manipulated. Repetition blindness occurred only at the higher rate (105 ms/item), and was found even for stimuli differing in orientation. We conclude that object‐centred representations are bound to episodic memory tokens, and that these are constructed prior to object recognition operating on novel as well as known objects. These results are contrasted with those found with written materials, and implications for explanations of repetition blindness are considered.     

The development of young children's memory strategies: First findings from the Würzburg Longitudinal Memory Study

This article reports the first findings of the Würzburg Longitudinal Memory Study, which focuses on children's verbal memory development, particularly the acquisition of memory strategies. At the beginning of the study, 100 kindergarten children (mean age 6 1/2 years) were tested on various memory measures, including sort-recall, text recall, short-term memory capacity, and metamemory. Assessments were repeated twice, with adjacent measurement points separated by 6-month time intervals. One major goal of the initial phase of the study concerned the exploration of the utilization deficiency phenomenon, which refers to the fact that young children who spontaneously use a memory strategy for the first time do not experience immediate memory benefits. Results obtained for the sort-recall task showed that, among those children who acquired a sorting strategy between Times 1 and 2, only a small proportion experienced the utilization deficiency problem. Additional analyses demonstrated that these few children also performed more poorly on the short-term memory tasks and the text recall measure when compared with the groups of efficient strategy users, suggesting that utilization deficiency is accompanied by a more general memory capacity problem. Overall, the findings revealed enormous variability in the early acquisition of memory strategies, indicating that the utilization deficiency phenomenon might not be as frequent as is assumed in the relevant literature.     

On the fate of distractor stimuli in rapid serial visual presentation

Observers demonstrate an impaired ability to report the second of two targets in a rapid serial visual presentation (RSVP) stream if it appears within 500 ms of the first target--a phenomenon known as the attentional blink. This study investigated the fate of stimuli in dual-target RSVP streams that do not require report--the distractors. In five experiments, observers viewed dual-target RSVP streams where the items flanking Target 1 either had the same identity (repeats) or a different identity (non-repeats). Repeated distractors reduced the attentional blink, but only if two conditions were met (1) the items flanking Target 1 were featurally identical and (2) the distractors were drawn from a different alphanumeric category to the targets (e.g. digits vs. letters). We interpret this reduced blink magnitude in the repeat trials as evidence that in RSVP streams distractor items that appear in close temporal proximity to Target 1 are inhibited and we propose that this inhibition occurs both at the level of alphanumeric features and abstract identities.     

Spatial awareness, alertness, and ADHD: the re-emergence of unilateral neglect with time-on-task

Studies examining a relationship between attention deficit hyperactivity disorder (ADHD) and relative visual inattention towards left space have produced inconsistent results. Here, based on previous studies with adult neurological patients who show very severe inattention to the left, we examine whether any spatial bias in ADHD may be modulated by changes in alertness levels. In a single case, we found that inattention to the left--that was intermittently apparent--dramatically increased as a function of time-on-task. No significant changes were observed on the right. The implications for clinical assessment and research design are discussed.