Table 3.

Correlations between amplitude/latency measures from brain regions identified as being important for differentiating between cluster groups, and task performance are shown in the upper portion of the columns. Negative correlations are identified by “−“ and positive correlations are identified by “+”. Correlations between amplitude/latency measures and neuropsychological test results are shown in the lower portion of each column. All correlations listed were at least p<.05. Amplitude and latency measures were taken from “yes” and “no” evoked response data. CVLT=Trial 5; CVLTD=Delayed Recognition; REYC=Copy of REY Figure; REYI= Immediate recall; REYD=Delayed Recall.

Correlations for Amplitude/Latency Measures and Task/Neuropsychological Performance
ANT M3 & M4 (169–322 ms)	PAR M3 & M5 (166, 524ms)	PRE M2 (99 ms)	FRO M2-5 (113–768 ms)
Amp: -“No” RTs r=−.63 Lat: -“Yes” Correct r=−.73   +“No” RTs r=.59	Amp: -“Yes” Correct	r=−.47 Amp: -“No” Correct r=−.78	Amp: -“Yes” RTs r=−.61 Lat: +“No” RTs r=.71
Amp: -MMSE r=−.69   -EDU r=−.66   -PERF IQ r=−.71   -REYI r=−.64   -REYD r=−.64 Lat: -PERF IQ r=−.87   -VERB IQ r=−.79   -REYI r=−.64	Lat: -PERF IQ r=−.43   -VERB IQ r=−.48   -CVLT r=−.49   -CVLTD r=−.47	Amp: -MMSE r=−.67   -CVLT r=−68   -CVLTD r=−.81   -REYI r=−.71   -REYD r=−.65	Amp: +REYC r=.59   +REYI r=.76   +REYD r=.74 Lat: +REYC r=.78