Expanding computer science education in schools: understanding teacher experiences and challenges

The increased push for teaching computer science (CS) in schools in the United States requires training a large number of new K-12 teachers. The current efforts to increase the number of CS teachers have predominantly focused on training teachers from other content areas. In order to support these beginning CS teachers, we need to better understand their experiences and challenges encountered in the classroom. This study investigated U.S. CS teachers’ perspectives on the demands of teaching computer science and support needed to ensure quality teaching. Results suggested that teachers face a number of challenges, including isolation, lack of adequate computer science background, and limited professional development resources.     

The development of argument skills

This work sought to obtain experimental evidence to corroborate cross-sectional patterns of development in argument skills and to evaluate the effectiveness of an intervention designed to foster development of these skills in academically at-risk 13- to 14-year-olds. Students participated in 16 sessions of a collaborative, goal-based activity providing dense exercise of argumentive thinking. One condition included peer dialogues; another did not. The former was the more effective, although both groups progressed. Participants showed increased frequency of usage of powerful argumentive discourse strategies, such as counterargument, and decreased frequency of less effective strategies. Quality of individual arguments (for or against a claim) also improved, supporting the existence of a close relation between these two kinds of argument skills.     

Does rational persuasion influence potential consultees?

Success in collaborative school‐based consultation depends on whether teachers implement interventions suggested by consultants. In business literature, Rational Persuasion (RP) has been identified as one potentially effective way to influence consultee perceptions about proposed interventions. RP includes intervention information, why it is important to decide to use the intervention, and potential objections to the intervention with arguments against those objections. The influence of these RP elements on potential school‐based consultees has not been studied. This preliminary analog study investigated whether presenting RP importance and objections for behavioral interventions influenced teachers' ratings of acceptability, effectiveness, and commitment‐to‐implement. Participants included 71 teachers enrolled in graduate education courses. The within‐subject design included three video vignettes of each of three conditions for three different behavioral interventions (total of nine possible videos, three presented to each group). Results suggest that the influence of RP on acceptability, perceived effectiveness, and commitment‐to‐implement ratings was inconsistent. Implications for research and practice are discussed. © 2003 Wiley Periodicals, Inc. Psychol Schs 40: 627–640, 2003.     

Interference of delayed matching to sample in pigeons: Effects of interpolation at different periods within a trial and stimulus similarity

Delayed matching-to-sample performance by pigeons was interfered with by displaying a monochromatic annulus around the center (sample) pecking key. The wavelength of the annulus and its point of interpolation within a trial were varied to determine possible differential effects on matching accuracy. Experiment 1 showed that delayed matching was most disrupted when the interference stimulus (570 nm, 630 nm, or achromatic white) appeared during the delay interval of a trial. Little if any disruption occurred when the interference stimulus was present during the sample and choice periods. The spectral relationship between the chromatic interference stimuli (570 and 630 nm) and the sample stimuli (570 and 630 nm) did not consistently influence the degree to which matching accuracy was affected in any interpolation condition. Experiment 2 found a similar pattern of within-trial effects when the interference stimulus was simply a change from a white achromatic annulus to a chromatic one. This finding indicates that illumination changes, such as the popular houselight variation, are not necessary to produce interference in delayed matching to sample. Even with illumination held constant, however, performance was not differentially sensitive to the similarity between interference and sample stimulus wavelengths. It is suggested that other experiments showing similarity effects in interference of delayed matching to sample were conducted in such a way that subjects confused the interfering stimuli with the samples.     

Young Children's Long-Term Retention of a Pediatric Examination

Children at ages 3, 5, and 7 ( N = 187) provided reports of their physical examinations immediately following the checkup and after a delay of either 1, 3, or 6 weeks, or only after 3 weeks. The protocol used for all interviews consisted of initial general prompts, followed by increasingly specific questions as needed. Recall of standard features of the examinations was scored, along with responses to questions concerning acts that did not occur. Retention of the event was extensive and accurate. Although clear age effects were observed in recall, the delay interval did not strongly affect performance over the 6-week period. The amount of forgetting was significant at ages 3 and 5, but not at age 7. With increasing age, a greater percentage of the features was spontaneously recalled. When presented with incongruous questions, all children evidenced rates of correct denials that exceeded chance and few errors of commission. The initial interview did not affect delayed recall. Implications for children's testimony are discussed.