Asymptotic learning of alphanumeric coding in autobiographical memory

Studies of autobiographical memory have shown that observed levels of incidental learning are often relatively low. Do low levels of retention result simply from a low learning rate, or is learning also asymptotic? To address this question, it is necessary to trace performance over a large number of learning opportunities, and this was carried out in the context of the recent development of widespread texting behaviour. It was found that memory for the alphanumeric layout of a phone improved as a function of sending approximately the first 500 texts, but then the improvement stopped. The incidence of memory error was incompatible with a simple power-law relation but was modelled closely by an asymptotic relation. It is suggested that this pattern reflects a movement towards automaticity in the primary task which progressively closes down the possibility that incidental learning can occur.     

What <Emphasis Type="Italic">is</Emphasis> wrong with intelligent design?

While a great deal of abuse has been directed at intelligent design theory (ID), its starting point is a fact about biological organisms that cries out for explanation, namely “specified complexity” (SC). Advocates of ID deploy three kind of argument from specified complexity to the existence of a designer: an eliminative argument, an inductive argument, and an inference to the best explanation. Only the first of these merits the abuse directed at it; the other two arguments are worthy of respect. If they fail, it is only because we have a better explanation of SC, namely Darwin’s theory of evolution by natural selection.     

A method for describing preschoolers' activity preferences

We designed a series of analyses to develop a measurement system capable of simultaneously recording the free-play patterns of 20 children in a preschool classroom. Study 1 determined the intermittency with which the location and engagement of each child could be momentarily observed before the accuracy of the measurement was compromised. Results showed that intervals up to 120 s introduced less than 10% measurement error. Study 2 determined the extent of agreement between two observers who simultaneously collected data for 20 children using 30-, 60-, 90-, and 120-s momentary time sampling (MTS) intervals. The three larger intervals resulted in high levels of interobserver agreement (above 90%), whereas the 30-s interval resulted in unacceptably low levels of agreement (less than 80%). By allowing observers to select from among the different MTS intervals via a datasheet array and then collect data with the chosen system, Study 3 determined observers' preferences for the remaining MTS intervals. Both data collectors preferred the 90-s MTS procedure. The sensitivity of the 90-s MTS procedure, which was shown to be accurate, reliable, and preferred, was then demonstrated by its use to describe activity preferences of a classroom of children in Study 4. This system identified high- and low-preference activities for individual children and revealed interesting patterns of response allocation by the group.     

The effects of reinforcer pairing and fading on preschoolers' snack selections

The effects of reinforcement pairing and fading on preschoolers' snack selections were evaluated in a multiple baseline design. Baseline preferences for snack options were assessed via repeated paired-item preference assessments. Edible, social, and activity-based reinforcers were then exclusively paired with a less preferred snack option. Once the snack paired with reinforcement was selected most frequently, the three types of reinforcement were systematically faded. Frequent selections of the previously less preferred snack option were produced with paired reinforcement, but were disrupted for all children as the paired reinforcement was reduced to low levels. These data showed that paired reinforcement was initially effective in increasing preference for the originally less preferred snack options, but more permanent changes in the value of the snack options were not achieved. Conditions for producing persistent changes in children's snack choices are discussed.     

Evaluation of a class wide teaching program for developing preschool life skills

Recently, nonmaternal center-based child care has been linked to problem behavior in young children (National Institute of Child Health and Human Development, 2003). In response, a comprehensive program to promote prosocial skills was evaluated in a classroom of 16 children between the ages of 3 and 5 years. Classroom observations were conducted during evocative situations to determine the likelihood of problem behavior (noncompliance, vocal or motor disruptions, aggression) and preschool life skills. A classwide teaching program was then implemented in a staggered manner across instruction following, functional communication, delay tolerance, and friendship skills. These four categories of preschool life skills, which included two to four related skills, were selected for classwide teaching because they were either identified by educators as important for early school success, have often been taught following functional assessments of more severe problem behavior, or both. Skills were taught on a classwide basis during typically scheduled activities (circle, free play, transitions, meals) via instructions, modeling, role play, and feedback. A multiple probe design showed that the program resulted in an 74% reduction in problem behavior and a more than four-fold increase in preschool life skills. Similar beneficial effects of the program were evident in questionnaire data gathered prior to and at the close of the evaluation. Finally, the teachers who implemented the program reported overall high levels of satisfaction with the classwide teaching program, the target skills, and the results. Implications for the design of early childhood experiences for preempting the development of serious problem behavior are discussed.     

The impact of administration and inquiry on Rorschach Comprehensive System protocols in a national reference sample

We investigated the impact of administration and inquiry skills on Rorschach Comprehensive System (CS; Exner, 1974, 1991, 1993) protocols collected for the Italian adult nonpatient reference sample. The same research team collected CS protocols on two occasions. The initial reference sample (N = 212; Lis, Rossi, & Priha, 1998) was collected under the supervision of experienced psychologists who carefully studied CS administration and scoring procedures (Exner, 1986, 1990, 1993). The second sample (N = 101; Lis, Zennaro, Calvo, & Salcuni, 2001) was collected after the team obtained additional and sustained CS training from Rorschach workshops certified instructors. Both samples were scored, reliably but they showed large differences on many codes, with protocols from the second sample being richer and more complex than the first. The results indicate that administration skills can have a dramatic impact on CS protocols and may contribute to variations in samples collected by different investigators. Training standards should be devised to insure uniform administration procedures are followed when collecting CS protocols.     

Both sides of the story: explaining events in a narrative

Our experience of narrative has an internal and an external aspect--the content of the narrative’s representations, and its intentional, communicative aetiology. The interaction of these two things is crucial to understanding how narrative works. I begin by laying out what I think we can reasonably expect from a narrative by way of causal information, and how causality interacts with other attributes we think of as central to narrative. At a certain point this discussion will strike a problem: our judgements about what is a relevant possibility within the narrative’s story depend on our judgements of probability; but these latter judgements depend, in turn, on factors external to the world of the story, and cannot be explained in terms of causal relations available within the story. We need the external, author-centred perspective at this point. These different perspectives, the internal and the external, correspond to different types of explanations we may give of events in a story; I call these internal and external explanations. I show how these different explanations are made use of in two contrasting arthistorical projects. I use these examples as the basis for a generalisation about the structure of the two explanatory forms. Finally, I suggest some ways in which explanations of these two kinds relate to one another, and to our thinking when we are engaged by a narrative.

Individual differences in working memory capacity and divided attention in dichotic listening

The controlled attention theory of working memory suggests that individuals with greater working memory capacity (WMC) are better able to control or focus their attention than individuals with lesser WMC. This relationship has been observed in a number of selective attention paradigms including a dichotic listening task (Conway, Cowan, & Bunting, 2001) in which participants were required to shadow words presented to one ear and ignore words presented to the other ear. Conway et al. found that when the participant’s name was presented to the ignored ear, 65% of participants with low WMC reported hearing their name, compared to only 20% of participants with high WMC, suggesting greater selective attention on the part of high WMC participants. In the present study, individual differences in divided attention were examined in a dichotic listening task, in which participants shadowed one message and listened for their own name in the other message. Here we find that 66.7% of high WMC and 34.5% of low WMC participants detected their name. These results suggest that as WMC capacity increases, so does the ability to control the focus of attention, with high WMC participants being able to flexibly “zoom in” or “zoom out” depending on task demands.     

Use of a high‐probability instructional sequence to increase compliance to feeding demands in the absence of escape extinction

We evaluated the effects of a high‐probability (high‐p) instructional sequence on the feeding‐related compliance (food acceptance) of a young boy diagnosed with a feeding disorder. The high‐p sequence consisted of three presentations of an empty spoon; the low‐probability (low‐p) instruction was the presentation of a spoon with food. Results showed that acceptance of food increased in the presence and not the absence of the high‐p sequence. Data are discussed in terms of the role of high‐p instructional sequences in the treatment of feeding problems. Copyright © 2007 John Wiley & Sons, Ltd.