This paper describes the role of data and task context in young children's interpretation of and reasoning about data tables. A design-based descriptive study was conducted with fourteen 5-year-old children in their first year of formal schooling. A picture storybook provided the data context for a data modelling activity that focused on…

The purpose of this study was to explore how students with high- and low-prior-knowledge employed multiple representations in argumentation evaluation and generation tasks. The argumentation performance and eye-movement behaviors of 96 college students in these tasks were investigated. The number of participants who proposed complex argumentation…

Linear functions are an important part of the middle school mathematics curriculum. Students in the middle grades gain fluency by working with linear functions in a variety of representations (NCTM 2001). Presented in this article is an activity that was used with five eighth-grade classes at three different schools. The activity contains 15 cards…

In this action research, first-graders were challenged to cope with a sequence of modelling tasks involving an analysis of given situations and choices of mathematical tools. In the course of the sequence, they underwent a change in the nature of their problem-solving processes and developed modelling competencies. Moreover, during the task…

The present study examined whether various indices of interference control were related to one another and to other cognitive abilities. It was found that the interference control measures were weakly correlated and could form a single factor that was related to overall memory performance on the tasks as well as to measures of working memory…

Tables are a presentation format that is commonly used to organize information, and they are widely present in many scenarios of our students' everyday activities; however, there is a scarcity of studies devoted to their analysis. Some of these studies point out that the organization of data into a double-entry table presents difficulties for…

Background: Children with language impairments have difficulty in reporting verbal inferences, but it is unclear whether the source of this problem lies in limitations of language comprehension, an inability to access world knowledge, or the integration of information in discourse. Children with pragmatic language impairments (CwPLI) are often…

Typical prevailing task analysis really is skill analysis whose product is a set of generic tasks considered to exhaust or sufficiently sample a skill domain. This approach yields tasks as the base entities of analysis; any understanding of interrelations of structures in the skill architecture in consequence must occur--if at all--above the level…

An opinion survey method for identifying low aptitude job types was developed and used in a study of 11 Air Force career ladders. Lists of low aptitude tasks were defined by technical advisers. These tasks were then rated on nine factors by Air Force instructors who also described low aptitude job types and gave their opinion concerning the…

Describes, justifies, and illustrates a process for analyzing and comparing instructional development (ID) models at the task and subtask levels. ID tasks and subtasks are identified, weights are assigned to the subtasks, and various instructional design and instructional development models are compared, as to both comprehensiveness and…

In three experiments involving situations previously called upon in support of representativeness theory, questionnaire responses from 265 university students demonstrated systematic biases that deviated sharply from the obvious predictions of the theory. The implications for representativeness theory are discussed. (Editor/RK)

The purpose of the study was to evaluate and improve the job inventory method of job analysis as applied to officer positions. Seven utilization fields were analyzed and inventories were constructed for another three fields. The basic finding was that the inventory method can be used operationally in the analysis of officer jobs if job analysts…

In this article, 41 models of covariation detection from 2 x 2 contingency tables were evaluated against past data in the literature and against data from new experiments. A new model was also included based on a limiting case of the normative phi-coefficient under an extreme rarity assumption, which has been shown to be an important factor in…

Presents data from a study investigating whether pupil involvement in tasks was different for high, middle, and low achievers. Results of the study are presented in nine tables. (BR)

The difficulty of four binary conceptual rules (conjunctive, disjunctive, conditional, and biconditional) was assessed using the rule-learning paradigm in a variety of stimulus populations. (Editor)