The relegation of spatial knowledge to a subordinate position has particular implications for examining mathematics underachievement. First, most of use have observed in our teaching that some mathematics underachievers (that is, those who have difficulty comprehending numerical ideas) can comprehend elementary spatial concepts but because they lack fluency in number they cannot make sense of t...

English pronouns must agree with their antecedents in number. But in some situations, pronouns violate this constraint, as in "I think I'll order a frozen margarita. I just love them." Three situations are identified in which such violations occur: (1) Plural (and technically illegal) pronouns are used to refer to frequently or multiply occurring items or events (as opposed to a unique item/eve...

Recent theories of concepts have raised the issue of how people combine simple concepts (like engine and repalr) to form complex concepts (like engine repalr). This article approaches this issue by asking how people comprehend modified noun phrases of this sort. One explanation of how complex concepts are understood (the feature weighting model) provides a simple mechanism in which the primary ...