Table 1.
Summary of psychopathology measures available in the Twins Early Development Study (TEDS)
| Construct | Measure | Age/reporter | Reference |
|---|---|---|---|
| ADHD behaviours | Conners Parent Rating Scale | P12, P16 | Conners (2003) |
| Aggression | Reactive‐Proactive Aggression Questionnaire | P9, T9 | Dodge and Coie (1987) |
| Anxiety‐related Behaviours | ARBQ | P16 | Eley et al. (2003) |
| Autism traits | Autism traits | P7, T7 | DSM‐IV criteria items |
| Childhood Autism Spectrum Test (CAST) | C9, P9, T9, C12, P12, T12 | Scott et al. (2002) and Williams et al. (2005) | |
| Autism Quotient (AQ) | C16, T16 | Baron‐Cohen et al. (2001) | |
| Callous Unemotional Traits | Callous Unemotional Scale | P16 | Kimonis et al. (2008) |
| Conduct Problems | Strengths and Difficulties Questionnaire (SDQ) | P7, T7, C9, P9, T9, C12, P12, T12, C16, T16 | Goodman (1997) |
| Depressive Symptoms | Moods and Feelings Questionnaire (MFQ) | P12, C16, T16 | Angold et al. (1995) |
| Emotional Problems | Strengths and Difficulties Questionnaire (SDQ) | P7, T7, C9, P9, T9, C12, P12, T12, C16, T16 | Goodman (1997) |
| Hyperactivity | Strengths and Difficulties Questionnaire (SDQ) | P7, T7, C9, P9, T9, C12, P12, T12, C16, T16 | Goodman (1997) |
| Peer Problems | Strengths and Difficulties Questionnaire (SDQ) | P7, T7, C9, P9, T9, C12, P12, T12, C16, T16 | Goodman (1997) |
| Prosocial Behaviour | Strengths and Difficulties Questionnaire (SDQ) | P7, T7, C9, P9, T9, C12, P12, T12, C16, T16 | Goodman (1997) |
| Psychopathic Tendencies | Antisocial Process Screening Device (APSD) | P7, T7, P9, T9, C12, P12, T12 | Frick and Hare (2001) |
Letters refer to the reporter (C = child self‐report, P = parent report, T = teacher report), and numbers refer to the ages at which measures were available.