Learning to Pipet Correctly by Pipetting Incorrectly?

Semiautomatic pipetting device (the governor pipet) for clinical chemistry procedures.

USTED et al. reported recently on the use of an electronic fibrin switch for the determination of prothrombin time (1). We have made similar observations and drawn the same conclusions, using this instrument (Fibrometer*). It occurred to us that the semiautomatic pipet employed for the measurement of plasma as well as reagents in the determination of prothrombin time might easily be adapted to ...

Does Guessing Incorrectly Impair Fact Learning?

In learning new information through testing with feedback, is it best for the learner to guess when unsure, or does that cause errors to become engrained? On day 1, subjects learned 80 facts, and were then tested on each. When a subject reported being unable to give an informed response, on a randomly chosen half of all trials the computer insisted upon a guess and provided corrective feedback ...

Differences in visual attention between those who correctly and incorrectly answer physics problems

This study investigated how visual attention differed between those who correctly versus incorrectly answered introductory physics problems. We recorded eye movements of 24 individuals on six different conceptual physics problems where the necessary information to solve the problem was contained in a diagram. The problems also contained areas consistent with a novicelike response and areas of h...

Reading Student Essays May Be Hazardous to Your Spelling: Effects of Reading Incorrectly and Correctly Spelled Words

In two experiments, we examined effects on spelling of reading and of reproducing correctly and incorrectly spelled words. Reading correctly and incorrectly spelled words influenced later spelling accuracy for those same words. Reproducing the spelling of words did not have any effects on later spelling accuracy beyond those produced by reading the words. However, reproducing a correctly spelle...

Hazards of mouth pipetting.