The smallest change in stimulation that can be detected 50 percent of the time is called the ______ threshold

According to the article Some Restrictions May Apply about maltreated children, a study which mimics a real-world setting or is conducted in a real-world setting is most likely to be:

(a) highly reliable (b) ecologically valid (c) contextually sound (d) internally valid

Which of the following is made by labeling class intervals on the

abscissa, frequencies on the ordinate, and then drawing bars for each class interval with the height of each bar being determined by the number of scores in each class? a. scatter diagram b. histogram c. frequency polygon d. normal curve