Describes an experiment designed to determine which language errors interfere to the greatest degree with comprehension by native speakers of the language. For this purpose, an instructor prepared a list of most serious Spanish language errors which was submitted to native speakers for evaluation in terms of comprehension and acceptability. (MES)

Describes a study designed to examine native speakers' reactions to errors contained in compositions written by advanced Spanish students, as a measure of error seriousness and a guide for selective correction. Suggests that errors interfering with comprehension should be eliminated first, followed by those that elicit negative reactions from…