Reply to Humphreys' and Parsons' ″Piagetian tasks measure intelligence and intelligence tests assess cognitive development

Relationships which exist among 27 Piagetian reasoning assessments and standard measures of intelligence and achievement were determined in a study conducted by Stephens, McLaughlin, Miller and Glass. Subsequently a study conducted by Humphreys and Parsons was purported to correct errors in the original designs of the Stephens et al. study. In reply Glass and Stephens note fallacies in Humphreys and Parsons reasoning and question their statement that measures of intelligence and Piagetian reasoning assessments can be used interchangeably.     

Newborns' central vision: Whole or hole?

We studied visual detection in 150 infants, 1- to 7-days old, by presenting single lines varying in width and location. We found that newborns detected a line only 8′ wide in the central visual field. Peripherally, they appeared to detect lines of 33′, 33′, and 1°6′ at 10°, 20°, and 30°, respectively. Thus, both the central retina and the peripheral retina appear to function at birth.