Answer:
Developmental milestones may be achieved gradually
Explanation:
All aspects of personality are stable and do not change throughout one's life. Stage theories can also help researchers who are examining physical development examine discrete changes in the brain that allow certain developmental milestones to be reached.
Answer: <em>Socioemotional selectivity theory</em>
Explanation:
Socioemotional selectivity theory which was developed by Laura L. Carstensen, is considered as a life-span theory(motivation). The theory tends to maintain that as the time passes, as an individual typically grows with time, people tend to become selective, also investing more resources in goals that tend to be emotionally meaningful. In accordance with this theory, the motivational shifts tends to influence the cognitive processing.
Explanation:
(a) Experimental unit
A person or an object, or some well-defined body or item on which some treatment is applied
(b) Treatment
Combination of a values of factors. These are explanatory variables.
(c) Response variable
The qualitative variable or quantitative variable in which the researcher wants to determine how the value is affected by any explanatory variable.
(d) Factor
It is the variable whose influence on a response variable can be assessed by the researcher.
(e) Placebo
An innocuous treatment, like a sugar tablet, which looks, smells and tastes like an experimental medication.
(f) Confounding
The effect of the two factors cannot be distinguished.
