Apparent reversals in trapezia: confirmation of the 'tan apex ratio' heuristic

A new model for predicting the frequencies of apparent reversals in rotating trapezia, proposed by the authors in 1983, is validated and extended in two studies. Experiment 1 showed that the model retained its predictive efficiency over an increased range of shapes and viewing distances, and with trapezia made of sheet metal and not, as previously, of wire. Experiment 2 was designed to investigate an unexpected effect, in which the specificity of prediction was found to decrease as the corners of the stimulus objects were slightly rounded.     

THE EFFECTS OF TEXT ADAPTATION ON RATED APPEAL AND DIFFICULTY

This study was designed to investigate how low‐achieving readers rate high‐interest low vocabulary adaptations and their original story versions for difficulty and appeal. Five hundred and seventy‐six Title 1 junior and senior high school students were assigned randomly to read and rate one of eight story versions (three original versions and five adaptations). Significant differences in difficulty and appeal ratings were found across the eight story versions. Adaptations were rated as being easier than original stories. Generally, changes in length and readability did not affect appeal. The one exception to this finding was a story adaptation that also had a substantial content modification. The quality of a story was found to be the important factor affecting appeal.     

Two routes to perspective: Simulation and rule‐use as approaches to mentalizing

We review evidence relating to children's ability to acknowledge false beliefs within a simulation account according to which our focus is set by default to the world as we know it: hence, our current beliefs assume salience over beliefs that do not fall into this category. The model proposes that the ease with which we imaginatively shift from this default depends on the salience of our current belief, relative to the salience of the belief that is being simulated. However, children do use a rule‐based approach for mentalizing in some contexts, which has the advantage of protecting them from the salience of their own belief. Rule‐based mentalizing judgements might be faster, cognitively easier and less prone to error, relative to simulation‐based judgements that are much influenced by salience. We propose that although simulation is primary, rule‐based approaches develop as a shortcut; we thus grow from individuals capable of using only simulation into individuals capable of both techniques.