APA-Format Check

Read the following sentences and locate the error in APA format.

1		In his controversial research, Rosenhan questioned the nature of psychiatric diagnosis and hospitalization. After Rosenhan's research article was published, many psychologists and psychiatrists wrote articles in response to Rosenhan's questions (e.g., Spitzer; Weiner).
2		Haden (1998) recruited participants through county birth records and newspaper advertisements. Participants in her sample "were White, middle-class, two-parent families in which the mothers were the primary caregivers" and highly educated.
3		To assess D.'s progress during the intervention Hartl and Frost (1999) computed CRs. They first measured the room dimensions and the square footage of surface space for each piece of furniture, and then determined the portion of space covered by clutter. The larger the ratio the greater the clutter. Hartl and Frost calculated CRs for each room before treatment and after four, ten, twenty-four, thirty-two, thirty-six, and forty-five sessions. [There are two errors.]
4		Following the apology and offense removal manipulations, we assessed participants' self-report responses toward the experimenter on empathy, acceptance, and blame items. All items were rated on 1 to 5 rating scales.