The influence of brief stimuli uncorrelated with reinforcement on choice between variable-ratio schedules

Experiment 1 investigated the behavior of rats trained to leverpress on a concurrent variable ratio (VR) 30 VR-30 schedule with a brief, 500-msec, light occurring at the midpoint of the ratio on one of the levers. Higher response rates were recorded on the lever associated with this stimulus, a finding that paralleled the effect produced by inserting primary reinforcement at the midpoint (i.e., by training on a concurrent VR-30 VR-15 schedule). Similar results were found in Experiment 2 using a concurrent VR-20 VR-20 schedule with a 2-sec visual stimulus presented midway through one of the components. In addition, a brief stimulus inserted midway through the VR-20 component of a concurrent VR-20 VR-10 schedule retarded the development of a difference in response rates between the components relative to a VR-20 VR-10 group lacking the signal. In Experiment 3, multiple VR VR schedules were used. Again, the response rate was higher in the component that had the added stimulus or, for a second group of subjects, on the component with the smaller response requirement. Probe-choice trials revealed a preference for the component that generated the higher rate in both groups. Presenting a stimulus partway through a ratio appears to reduce the effect on response rate and choice of a large ratio value.     

Reading,spelling and two types of irregularity in word recognition

How do good and poor readers, and good and poor spellers, vary in their decisions about words which have varying spelling-to-sound correspondences? This experiment isolates the effects of visual and phonological characteristics of words with schoolchildren of varying reading and spelling ability, aged between 9 and 11.5 years. Three groups of children were tested: good readers and good spellers, good readers who were poor spellers, and children who were both poor readers and poor spellers. The difference between‘good’and‘poor’was about two years according to the standardised tests which were used. The children performed a lexical decision task, deciding whether each letter-string was a word or not. Response times to three types of words were compared: standard regular words (e.g. SLOT, SPADE), words with common orthography but irregular spelling-to-sound relationships (e.g. HAVE, FEVER), and words with unusual orthography as well as irregular spelling-to-sound relationships (e.g. BISCUIT, ANSWER). The performance of good readers but not of poor readers was impaired on the words which were phonologically irregular (compared with regular words). Poor spellers were worse again on the dually irregular words, although not significantly, while the good spellers performed almost as well on these words as on the regular words. These results have a number of implications: that the regularity effect is phonologically and not orthographically mediated, that good readers use a predominantly phonological strategy in lexical decision while poor readers do not, and that for the best readers/spellers as tested here the orthographically and phonologically irregular words have some sort of special status which allows them to gain fast and accurate responses.     

Potentiation of delayed matching with variable delays

In a delayed matching-to-sample procedure, pigeons chose a comparison stimulus that matched a sample stimulus presented earlier in the trial. The duration of the delay between sample-stimulus presentation and comparison-stimulus presentation was either varied over five values within each session or held constant within each session but varied over five blocks of sessions. Accuracy of matching to sample was higher overall with variable delays than with delays fixed within sessions. The result indicates that remembering depends on the temporal context provided by delay intervals.     

Digital storytelling as a disciplinary literacy enhancement tool for EFL students

Educational technology research and development - This research compared the process of disciplinary literacy acquisition of students who experienced two different pedagogical approaches to...     

Cognitive Style and Pupil Learning Preferences

A total of 78 12‐year‐old pupils from four secondary comprehensive schools were given the computer‐presented Cognitive Styles Analysis, which determined the position of each pupil on two learning style dimensions: Wholist‐Analytic and Verbal‐Imagery. They were also given individually a structured interview questionnaire to assess their learning preferences in English and science in terms of: (a) mode of working, (b) task outcomes and (c) social context. The English and science teachers were asked to rate the achievement level of the pupils in their subject and this was used as an index of ability. The main findings were as follows, (a) Preferred Mode of Working: As expected, there was a tendency for Imagers to use pictures and Verbalisers to prefer writing, and this increased with ability and what the subject would naturally allow. There was evidence that lower ability pupils were more constrained by the usual format for the subject than were those of higher ability, (b) Social Context: Overall, Group or Pair was preferred to Individual work. Group work was particularly liked by Wholists and especially by lower ability Wholist‐Imagers. Individual work was least disliked by Analytics, particularly in the case of higher ability Verbalisers (c) Task Outcomes. For open versus closed tasks, open tasks were preferred by lower ability pupils, while high‐ability Wholist‐Imagers preferred closed tasks. The findings were discussed in terms of their implications for current practice.     

Loss of Institutional Trust Among Racial and Ethnic Minority Adolescents: A Consequence of Procedural Injustice and a Cause of Life‐Span Outcomes

This research tested a social‐developmental process model of trust discernment. From sixth to eighth grade, White and African American students were surveyed twice yearly (ages 11–14; Study 1, N = 277). African American students were more aware of racial bias in school disciplinary decisions, and as this awareness grew it predicted a loss of trust in school, leading to a large trust gap in seventh grade. Loss of trust by spring of seventh grade predicted African Americans’ subsequent discipline infractions and 4‐year college enrollment. Causality was confirmed with a trust‐restoring “wise feedback” treatment delivered in spring of seventh grade that improved African Americans’ eighth‐grade discipline and college outcomes. Correlational findings were replicated with Latino and White students (ages 11–14; Study 2, N = 206).     

A theoretically driven teaching and research framework: learning technologies and educational practice

The emphasis of this paper is on the derivation of design principles from qualitative analysis of student reflections based on their participation in authentic, collaborative and technology-mediated activities. This paper reports on the initial phases of a design-based research project at a comprehensive university in South Africa where the authentic nature of the activities contributed to the depth of student reflections and ultimately led to meaningful design principles based entirely on the experiences of students. Students’ reflective reports were analysed for their content using simple inductive coding techniques leading to the identification of themes and the derivation of design principles from further refinement of these themes. These design principles, therefore, have their origins in the specific theories underpinning the learning activities that were used in the teaching and learning process, and contribute once again in an innovative way to this same body of knowledge. This theory-driven praxis thus makes a contribution to both educational theory and teaching practice which is applicable across a variety of contexts and sectors worldwide. More importantly, this can be seen as meaningful research that is socially responsible, with a high theoretical and practical value, and of relevance to a wider international audience.     

‘Always the Outlaw’: The Potential for Subversion of the Metanarrative in Retellings of Robin Hood

This paper examines six recent retellings of Robin Hood and concentrates on the representation of class, religion and gender in the texts. The question is asked: ‘what values do the texts implicitly or explicitly arm?’ The idea that Robin Hood retellings are systematic of a socially and politically conservative ideology is interrogated by considering moments of possible transgression of the universalistic metanarrative in the texts.