First time (seconds) to articulate (1 syll. words) First time (seconds) to articulate (3 syll. words) First time (seconds) to articulate (5 syll. words) Digit-symbol copy test (WAIS-III) Digit-symbol coding test (WAIS-R)
PASAT score -.019,
NS
-.086,
NS
-.115,
NS
.211,
p=.0245
.558,*
p<.0001
PASAT % -.023,
NS
-.089,
NS
-.121,
NS
.213,
p=.0231
.566,*
p<.0001
Digit forward span -.055,
NS
-.018,
NS
-.051,
NS
-.143,
NS
.278,
p=.0018
Digit backward span -.135,
NS
-.204,
p=.0437
-.248,
p=.014
.262,
p=.0034
.342,
p=.0001
Short-word span
(1 syll. words)
.014,
NS
-.029,
NS
-.007,
NS
.117,
NS
.246,
p=.006
Long-word span
(4 syll. words)
-1,948E-4,
NS
.041,
NS
.065,
NS
.112,
NS
.212,
p=.0176
Articulatory speed
Time (seconds) to articulate
(1 syll. words)
.828,* p<.0001 .764,* p<.0001 .726,* p<.0001 -.605,* p<.0001 -.343, p=.0007
Time (seconds) to articulate
(3 syll. words)
.737,*
p<.0001
.931,*
p<.0001
.842,*
p<.0001
-.586,*
p<.0001
-.266,
p=.0084
Time (seconds) to articulate
(5 syll. words)
.637,* p<.0001 .817,* p<.0001 .930,* p<.0001 -.639,* p<.0001 -.228, p=.0239
Dissimilar-letter span -.131,
NS
-.075,
NS
-.158,
NS
.211,
p=.0183
.363,
p<.0001
Similar-letter span -.127,
NS
-.187,
NS
-.177,
NS
.289,
p=.0012
.301
p=.0008
Corsi forward span -.07,
NS
-.175,
NS
-.086,
NS
.257,
p=.004
.243,
p=.0067
Corsi backward span .005,
NS
-.017,
NS
-.01,
NS
.086,
NS
.225, p=.0118
a span test
Initial word span
-.109,
NS
-.122,
NS
-.078,
NS
.239,
p=.0076
.243,
p=.0066
Stroop test
Reading:
raw time

.375,
p=.0003

.396,
p=.0001

.382,
p=.0002

-.287,
p=.0015

-.524,*
p<.0001
Naming:
raw time
.295,
p=.0041
.383,
p=.0002
.409,
p<.0001
-.34,
p=.0002
-.545,*
P<.0001
Interference: raw time .329,
p=.0015
.416,
p<.0001
.409,
p<.0001
-.303,
p=.001
-.534,*
p<.0001
Flexibility:
raw time
.285,
p=.0071
.314,
p=.0031
.306,
p=.0039
-.355,
p=.0001
-.614,*
p<.0001
Table 4: Correlations between the three indexes of processing speed and impaired performances of RRMS patients