There was a strong proximity effect for conjunction stimuli on the subsequent recognition test, with the most false alarms occurring for within-pair conjunction faces.
The association in DZ men was attenuated following adjustment for within-pair difference in adult height and to a greater extent after adjustment within-pair difference in adult fat free mass (Table 4).
All analyses were corrected for within-pair dependency, by clustering on pair identification, to avoid underestimation of the variance.
For within-pair interaction data, we calculated the percentage of positive to all possible call combinations for males and females of each pair in each breeding stage and for each call-type combination.
When the number of offspring was broken down into within-pair and extrapair young, the increase was significant for within-pair young, and nearly so for extrapair young (Table 3).
The same was true for the majority of loci (at six of nine loci for DNA methylation and at five of nine loci for within-pair differences; Table S3).
The same contrast between age groups was evident for within-pair (Fig. 2a) and extrapair success (Fig 2c) analyzed separately, though the positive correlation between tail length and number of extrapair offspring was not statistically significant for older males.
The difference was statistically significant both for the number of within-pair offspring and for the number of extrapair offspring analyzed separately (Table 2).
Correction for dependency between twin pairs done for In within-pair comparisons, there were no differences in SBRs between a twin and her co-twin in either of the brain regions in neither the group of twins discordant for BN (n = 6 pairs) nor the healthy twin pairs (n = 9 pairs).
To account for within-twin pair correlations of functional MRI signals, first-level results of the twin and co-twin of each concordant pair were entered as repeated measures.
Differences in survey- and interview-based variables were tested using a mixed-model ANOVA [mixed models linear menu item in statistical package for the social sciences (SPSS; Chicago, IL, USA)] with twin pair type (discordant versus concordant) and obsessive compulsive symptoms score (high versus low) as two fixed factors and family as a random factor to account for within-twin pair dependence.
