No effects of siblings and twin testosterone transfer on autistic traits.

Background: Having twin and non-twin siblings might influence autistic traits both prenatally and postnatally. The twin testosterone transfer hypothesis suggests that girls with a twin brother are exposed to higher levels of prenatal testosterone than girls with a twin sister, and that increased testosterone exposure masculinizes neural development and increases autistic traits. Postnatally, siblings may provide example behaviour, which could reduce autistic traits.

Child neurocognitive functioning influences the effectiveness of specific techniques in behavioral teacher training for ADHD: Moderator analyses from a randomized controlled microtrial.

Background: Childhood attention-deficit/hyperactivity disorder (ADHD) is associated with several neurocognitive impairments. Whether these impairments influence the effectiveness of techniques that are commonly used in behavioral teacher training for ADHD has not been investigated so far.

Method: In this microtrial, teachers of 90 children with ADHD symptoms (6-12 years) were randomly assigned to a short intervention consisting of either antecedent-based (stimulus-control) techniques or consequent-based (contingency management) techniques, or to a waitlist control condition.