Reward contrast in delay and probability discounting

In this study, we examined whether reward contrast influences choice between delayed and probabilistic outcomes. Specifically, we predicted that the subjective value of an intermediate reward would seem relatively larger or smaller, respectively, if it followed choices involving a smaller or larger reward and would produce corresponding changes in rates of delay and probability discounting. In Experiment 1, subjects made choices about hypothetical 5,000 or5,000 or 50 outcomes and then made choices about 500 outcomes. Delay-discounting rates for the500 outcomes. Delay-discounting rates for the 500 outcome were larger for Group 5,000 than for Group5,000 than for Group 50, whereas the opposite result was obtained for probability-discounting rates. In Experiment 2, we used a design that allowed for contrast effects to be assessed within subjects. Two groups made choices about delayed or probabilistic rewards. After completing question blocks in which the amount was 5,000 or5,000 or 50, subjects responded to questions with an intermediate amount (475/475/525). For Group Delay, the present value of the intermediate reward was greater after the 50 block than after the50 block than after the 5,000 block, whereas the opposite was obtained for Group Probability. The results from both experiments confirmed the predictions of reward contrast and suggested that the subjective value of a monetary reward varies inversely with the prior reward amount.     

A participatory approach to the identification of measures of number sense in children prior to school entry

The research reported in this paper used a modified Delphi procedure in an attempt to establish a consensus on tasks proposed to assess components of number sense identified as essential for early mathematics success by a broad range of academics with expertise in the area of early mathematics. Tasks included as measures of these components were based on assessment tasks developed by early mathematics researchers. Eighteen questionnaires were returned by academics from Australia, the UK, New Zealand, The Netherlands and the USA, all with published work in the areas of early mathematics and/or number sense. Both the proposed components and tasks in the questionnaires were limited to the number domain. The study revealed considerable agreement with a number of the proposed tasks and thus provided a way forward for the development of an early number sense assessment to be trialled with young children prior to their first year of formal schooling.     

Optimising the use of note-taking as an external cognitive aid for increasing learning

Taking notes is of uttermost importance in academic and commercial use and success. Different techniques for note-taking utilise different cognitive processes and strategies. This experimental study examined ways to enhance cognitive performance via different note-taking techniques. By comparing performances of traditional, linear style note-taking with alternative non-linear technique, we aimed to examine the efficiency and importance of different ways of taking notes. Twenty-six volunteer adult learners from an information management course participated in this study. Cognitive performance scores from a traditional linear note-taking group were compared with another group by using a commercially available non-linear note-taking technique. Both groups were tested in two settings: after a classroom lecture and a panel forum discussion. Tasks included measures on story comprehension, memory, complexity of mental representations and metacognitive skills. Data analysis revealed that the non-linear note-takers were significantly better than the linear group both in terms of the quantity and the quality of the learned material. This study demonstrates the importance of using cognitively compatible note-taking techniques. It identifies the cognitive mechanisms behind effective note-taking and knowledge representation. Using such techniques enables deeper understanding and more integrated knowledge management.     

Diversity or Difference? New Research Supports the Case for a Cultural Perspective on Women in Computing

Gender difference approaches to the participation of women in computing have not provided adequate explanations for women??s declining interest in computer science (CS) and related technical fields. Indeed, the search for gender differences can work against diversity which we define as a cross-gender spectrum of characteristics, interests, abilities, experiences, beliefs and identities. Our ongoing case studies at Carnegie Mellon University (CMU) provide evidence to show that a focus on culture offers the most insightful and effective approach for investigating women??s participation in CS. In this paper, we illustrate this approach and show the significance of cultural factors by describing a new case study which examines the attitudes of CS majors at CMU. Our analysis found that most men and women felt comfortable in the school, believed they could be successful in the CS environment at CMU, and thought they fit in socially and academically. In brief, we did not see any evidence of a strong gender divide in student attitudes towards fitting in or feeling like they could be successful; indeed we found that the Women-CS fit remained strong from prior years. Hence, our research demonstrates that women, alongside their male peers, can fit successfully into a CS environment and help shape that environment and computing culture, for the benefit of everyone, without accommodating presumed gender differences or any compromises to academic integrity.     

Visual‐attentional span and lexical ­decision in skilled adult readers

The goal of the study was to examine the association between visual‐attentional span and lexical decision in skilled adult readers. In the span tasks, an array of letters was presented briefly and recognition or production of a single cued letter (partial span) or production of all letters (whole span) was required. Independently of letter recognition and phoneme awareness, width of partial recognition span predicted substantial variance only in detection of letter misorderings in words, while partial span efficiency made small contributions to decisions on regular words and pseudowords, but not strange words. With a production format and the inclusion of short‐term phonological memory, neither partial‐span nor whole‐span measures contributed positive independent variance to word and nonword decisions. The results provide meagre support for the idea that skilled adult readers with a wide visual‐attentional span might process words more effectively than those with a narrow span during lexical decision.     

Undergraduates’ text messaging language and literacy skills

Research investigating whether people’s literacy skill is being affected by the use of text messaging language has produced largely positive results for children, but mixed results for adults. We asked 150 undergraduate university students in Western Canada and 86 in South Eastern Australia to supply naturalistic text messages and to complete nonword reading and spelling tasks. The Australian students also completed two further real word and nonword reading tasks, a spoonerisms task, a questionnaire regarding their reading history, and a nonverbal reasoning task. We found few significant correlations between literacy scores and both use of textisms (such as u for you) and measures of texting experience. Specifically, textism use was negatively correlated with spelling for the Canadian students, and with scores for timed nonword reading, spoonerisms, and Adult Reading History for the Australian students. Length of phone ownership was negatively correlated with spelling (Canadians), but positively correlated with Word Attack scores (Australians), whereas daily message sending volumes were negatively correlated with Word Attack scores (Australians). Australian students who thought that using textisms was more appropriate had poorer nonword reading and reported having had more difficulty learning to read, than those who found it less appropriate. We conclude that there is inconsistent evidence for negative relationships between adults’ use of textisms and their literacy skills, and that these associations may be influenced by attitudes towards the appropriateness of textism use. A model of the potential relationship between adults’ textism use and literacy skills is presented.     

do i know its wrong: children’s and adults’ use of unconventional grammar in text messaging

There is concern that the violations of conventional grammar (both accidental and deliberate) often seen in text messages (e.g., hi how is ya?!!) could lead to difficulty in learning or remembering formal grammatical conventions. We examined whether the grammatical violations made by 244 British children, adolescents and young adults in their text messages was related to poorer performance on tasks of grammatical knowledge, including translating grammatically unconventional text messages into standard English. We found that variance in the production of grammatical violations in naturalistic messages was inconsistently predicted by grammatical task performance. Specifically, primary school children who made poorer grammar-based spelling choices were more likely to make more grammatical violations in their everyday messages, and university students who failed to correct more grammatical errors in a given set of messages were also more likely to make such errors in their own messages. There were no significant relationships for secondary school students. We conclude that using unconventional grammar when texting is not a consistent sign of poor grammatical abilities, although there may be links between some aspects of grammatical skill and grammatical violations in text messages.