Pregnancies Can Be Dated from the Onset of the Last

question 132

Multiple Choice

Pregnancies can be dated from the onset of the last menstrual period before conception or by

• A) assuming conception occurredtwo weeks after the beginning of a woman's last menstrual cycle.
• B) counting ahead nine months from the date the woman learned she was pregnant.
• C) counting forward from the date the woman believes she conceived.
• D) pregnancies are not dated as there is too much variability from woman to woman.

---

Definitions:

Fixed-Interval

In the context of psychological reinforcement, it refers to a schedule where rewards are given after a fixed time period has elapsed, assuming a correct response is made.

Random-Interval

A timing schedule in operant conditioning where reinforcements are given at unpredictable intervals.

Variability

The extent to which data points in a statistical distribution or data set diverge from the average value.

Brain Wave

Electrical patterns produced by the activity of the brain, often measured by electroencephalography (EEG).