The full-scale IQ is the sum of the verbal and performance IQ.
The total non-aggression score is the sum of the verbal and physical non-aggression subscales.
Childhood cognitive ability at age 8 years was represented as the sum of four tests of verbal and non-verbal ability devised by the National Foundation for Educational Research.
The total aggression score is the sum of the physical and verbal aggression subscales.
Scores for each subtest were converted to scaled scores and summed to yield the following scores: total (sum across all four subtests), verbal (sum of vocabulary and similarities subtests), and performance (sum of block design and matrix reasoning subtests; task duration: approximately 50 min).
The primary outcome of interest was the annual change in cognitive performance based on a 'composite cognitive score', a sum of individual scores in the Verbal Fluency, the Symbol Digit and all parts of the Stroop test (colour, word and interference).
Both the sum score and Factor 1 predicted the occurrence of verbal aggression (AUC = 0.70 and 0.69), while Factor 2 did not.
However, both the sum score and Factor 1 predicted the occurrence of verbal aggression (AUC = 0.70 and 0.69), while Factor 2 did not (Table 1).
Consistent with previous studies on verbal memory, carriers of the met-allele numerically revealed a reduced overall performance (sum of five direct recalls) in the verbal learning memory test, but this did not turn out to be statistically significant in the ANCOVA (F 2, 98) = 0.30, P = 0.74, effect size: f < 0.1).
To sum up, there is some evidence that the source of verbal threat information can make a difference.
Five different scores are derived from the test: immediate memory recall (trial 1 score); best learning (trial 5); verbal total learning (sum of scores of trials 1 through 5); delayed recall (trial 8); and memory recognition (trial 9).
