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Tympanic membrane (TM) temperature asymmetry has been proposed as a phenotypic marker of vulnerability to negative emotionality in children. Little is known about the stability of TM temperatures or how readily one can obtain a reliable index of the phenotype. TM temperatures were collected from 3- to 5-year-old children ( N=73) over 5 months ( Mdn=34 samples). Seven to 10 samples needed to be aggregated to achieve reliable measures (αs>.70). Using reliable estimates, TM asymmetry remained stable over time, r(72)=.72, p<.01; 70% of the children had warmer left TMs; and TM asymmetry correlated as predicted with measures of children's emotionality. TM asymmetry may be a phenotypic marker of vulnerability to negative emotionality, but measures obtained on one occasion may not reliably index the phenotype. [ABSTRACT FROM AUTHOR]

False memories have typically been found to be more common during early childhood than during later childhood or adulthood. However, fuzzy-trace theory makes the counterintuitive prediction that some powerful forms of adult false memory will be greatly attenuated in early childhood, an important example being the Deese/Roediger/McDermott (DRM) illusion. Three developmental studies of this illusion (N = 282) found that (1) it was at near-floor levels in young children, (2) it was still below adult levels by early adolescence, and (3) the low levels of the illusion in young children may be due to failure to "get the gist" of DRM materials. [ABSTRACT FROM AUTHOR]