An Expert Team of Scientists Compared 1,000 Sets of Monozygotic

question 98

Multiple Choice

An expert team of scientists compared 1,000 sets of monozygotic twins reared by their biological parents (Caspi et al., 2004) . The researchers asked the mothers to describe each twin. Descriptions ranged from very positive to very negative. The researchers measured personality at age 5 (including antisocial behavior as reported by kindergarten teachers) and then measured each twin's personality two years later. The results revealed that _____.

• A) if mothers were more negative toward one of their twins, that twin became more antisocial at age 7 than at age 5
• B) if mothers were less negative toward one of their twins, that twin became more antisocial at age 7 than at age 5
• C) if mothers were more negative toward one of their twins, that twin became less antisocial at age 7 than at age 5
• D) there was no relation between maternal negativity and child antisocial behavior

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Definitions:

Substance/Medication-Induced Sexual Dysfunction

A specific substance presumed to cause the sexual dysfunction.

Heroin Addiction

A severe substance use disorder characterized by a dependence on heroin, affecting physical and mental health.

Erection and Ejaculation

Physiological phenomena in male sexuality where erection is the stiffening of the penis, and ejaculation is the release of semen.

Erectile Disorder

A condition characterized by the consistent difficulty in achieving or maintaining an erection sufficient for sexual activity.