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Table 3 Correlation between processing speed and selected psychological and physiological measurements with and without controlling for sex, education, and medication

From: An examination of factors that may contribute to gender differences in psychomotor processing speed

 

Digit Symbol Coding

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Processing Speed Index

Controlling for sex, education, and medication

DS

SS

PSI

DS

SS

PSI

Age

 − 0.03

 − 0.06

 − 0.04

 − 0.09

 − 0.08

 − 0.09

Height

 − 0.16

0.03

 − 0.07

0.16

0.29**

0.25**

Weight

 − 0.20*

0.01

 − 0.08

 − 0.07

0.08

0.02

Body-mass index

 − 0.15

 − 0.01

 − 0.09

 − 0.18

 − 0.03

 − 0.09

Education

0.26*

0.12

0.21*

   

Medication

0.15

0.02

0.09

   

Beck Depression Index

 − 0.09

 − 0.03

 − 0.04

 − 0.07

 − 0.03

 − 0.05

WAIS Block Design

0.50***

0.30**

0.50***

0.54***

0.48***

0.54***

WAIS Matrix reasoning

0.35**

0.21

0.37**

0.37**

0.29*

0.38**

WAIS Perceptual reasoning index

0.47***

0.36***

0.47***

0.49***

0.38***

0.48***

WAIS Similarities

0.35***

0.19

0.28**

0.32**

0.17

0.25*

WMS Digit Span

0.30*

0.28*

0.30*

0.37***

0.30***

0.36***

WMS Logical memory immediate

0.46***

0.34***

0.43***

0.43***

0.35***

0.42***

WMS Logical memory delayed

0.49***

0.38***

0.47***

0.28*

0.27*

0.28*

Box and Block Dominant hand

0.25*

0.12

0.20

0.21

0.10

0.16

Box and Block Nondominant hand

0.33**

0.21

0.31**

0.31**

0.22

0.28*

Box and Block combined

0.28*

0.16

0.24*

0.26*

0.15

0.22

Grooved Pegboard DH

 − 0.43***

 − 0.20

 − 0.39***

 − 0.42***

 − 0.34**

 − 0.39**

Grooved Pegboard NDH

 − 0.47***

 − 0.30*

 − 0.46***

 − 0.47***

 − 0.40**

 − 0.46***

Grooved Pegboard combined

 − 0.47***

 − 0.39***

 − 0.45***

 − 0.47***

 − 0.39**

 − 0.45***

Grip strength DH

 − 0.09

0.02

 − 0.09

0.20

0.12

0.15

Grip strength NDH

 − 0.10

 − 0.03

 − 0.09

0.14

0.13

0.13

Grip strength combined

 − 0.13

 − 0.10

 − 0.14

0.18

0.08

0.13

One foot stand

0.16

0.13

0.15

0.14

0.14

0.14

PRF Dominance

0.30**

0.18

0.25*

0.39***

0.27*

0.33*

PRF Exhibition

0.24*

0.06

0.15

0.31*

0.09

0.21

PRF Achievement

0.01

 − 0.06

 − 0.02

0.10

 − 0.01

0.05

PRF Succorance

0.07

0.06

0.06

 − 0.06

0.00

 − 0.04

PRF Affiliation

0.09

 − 0.04

0.02

0.06

 − 0.06

 − 0.01

PRF Nurturance

0.15

0.10

0.13

0.04

0.03

0.04

PRF Cognitive structure

 − 0.16

 − 0.04

 − 0.10

 − 0.19

 − 0.05

 − 0.12

PRF Order

0.13

0.16

0.15

0.06

0.11

0.09

PRF Impulsivity

0.10

0.03

0.07

0.06

 − 0.01

0.02

PRF Defendence

0.19

0.22*

0.22*

0.17

0.20

0.20

PRF Anxiety

0.03

0.09

0.07

 − 0.01

0.06

0.03

PRF Guilt

0.03

0.01

0.02

 − 0.01

 − 0.06

 − 0.03

PRF Aggression

0.10

0.12

0.12

0.11

0.12

0.12

PRF Harm avoidance

 − 0.07

0.01

 − 0.03

 − 0.22*

 − 0.06

 − 0.15

PRF Sentience

0.30**

0.12

0.23*

0.18

0.04

0.11

PRF Desirability

 − 0.11

 − 0.08

 − 0.11

 − 0.15

 − 0.10

–0.14

  1. ***p < .001; **p < .01; *p < .05