The most widely used opiate is ______

When our responses are differentially controlled by our instincts, they are considered to be under stimulus control

Indicate whether the statement is true or false

Sabra and Yancy are fraternal twins. Yancy has Down syndrome. Yancy attains motor milestones in an orderly manner very similar to Sabra, though at a later age. This suggests an experiential determinant of motor development

Indicate whether the statement is true or false