Trial and error theory was given by whom?

"Learning takes place through a process of need reduction." The statement is given by -

If while teaching your younger brother, even after repeatedly telling the solution of a question, then you do not understand it?

In the following, which is not a characteristic of good mental health?

Match list-I with list-ll and select the correct answer using the codes given below -

List-1                            List-II

(1) Wundt                     (a) Psychoanalysis theory

(II) John Dewey           (b) First psychological lab

(III) Sigmund Freud    (c) Intelligence test

(IV) Binnet                   (d) Functionalism

Code -

Which one plays important role in social development of a child?

Suppose an individual tends to be solitary and lacks feelings for others. He is also likely to be insensitive, aggressive and hostile. If Eysenck's personality questionnaire is administered to such an individual, which one of the following will be score high on? 

The contribution of Educational Psychology is -