Table 3.

Scores on tests of language and object knowledge

Subject	WAB AQ	Grammar NAT/NAVS	Repetition WAB-REP	Naming BNT	Word association/ comprehension PPVT	Non-verbal object knowledge
						PPTpict	Context Match
PPA mean (SD)	84.2* (7.8)	88.3 (18.5)	84.4* (15)	23.1* (21.9)	52.5* (25)	85.1* (7.4)	88.2* (8.0)
NC mean (SD)	99.7 (0.7)	99.1 (2.4)	98.6 (2.8)	97.2 (3)	98.1 (3.4)	97.9 (2.1)	98.1 (2.2)

All scores are given as percentages of possible total scores for each measure.

Asterisks indicate significant (P < 0.05) differences between the means of control and PPA. Scores ≥80% indicate relatively preserved performance.

BNT = Boston Naming Test; NAT/NAVS = Northwestern Anagram Test and Northwestern Assessment of Verbs and Sentences; NC = control subjects; PPTpict = Pyramids and Palm Trees picture Test; WAB AQ = aphasia quotient of the Western Aphasia Battery; WAB REP = score on a subset of the six most difficult items in the repetition subtest of the WAB.