. 2016 Oct 25;7:1666. doi: 10.3389/fpsyg.2016.01666

Table 2.

Reliability and validity analyses for Malawi and UK samples.

Task	Correlations (r)
	Malawi				UK
	Split-half reliability	Test-retest reliability	Age	Predictive criterion validity^a	Split-half reliability	Age	Predictive criterion validity^a	Criterion validity
	Split-half reliability	Test-retest reliability	Age	Predictive criterion validity^a	Split-half reliability	Age	Predictive criterion validity^a	Block design	Symbol search
Manual processing speed	0.50^**	0.35^**	−0.29^**	−0.23^**	0.53^**	−0.35^**	−0.18	0.03	−0.25^*
Manual coordination	0.93^**	0.16^**	−0.16^*	−0.04	0.88^**	−0.10	0.03	0.05	0.07
Short-term memory	–	0.34^**	0.13	0.21^**	–	0.10	0.23^*	0.17	0.37^**
Visual attention	0.40^**	0.42^**	−0.34^**	−0.34^**	0.44^**	−0.25^*	−0.16	−0.11	−0.16
Working memory	–	0.05	0.07	−0.06	–	0.04	0.29^*	0.24^*	0.36^**
Spatial intelligence	–	0.12	0.13	0.20^**	–	0.08	0.31^**	0.33^*	0.15
Mathematics	–	0.73^**	0.39^**	–	–	0.30^*	–	–	–
		(n = 77)

^**

p < 0.001,

p < 0.05.

Predictive criterion validity: correlation coefficients for each of core cognitive and motor tasks and Mathematics. A reduced sample size of 77 pupils was used for the Malawi test-retest reliability of the Mathematics task.