Thinking: the mental exploration for finding out the solution of a problem. Memory: the retention or storage of information in any form. Forgetting: the inability to find the correct information (from our memory) at the given situation. Imagination: an idle, passive activity based on previous experience in which one thinks of remote objects. Reasoning: ab highly purposeful, controlled, selective and step by step thinking 8.7 SUGGESTED READING 1) S.S.Chauhan (2004) , Advanced Educational Psychology, Vikas Publishing House PVT LTD, New Delhi- 110014 2) SK. Mangal (2008), Advanced Educational Psychology, Prentice Hall of India Private Limited. New Delhi. 3) Lahey Benjamin B.(2000),Psychology- An Introduction, sixth edition. Tata McGraw-Hill Publishing Company Limited. New Delhi. 4) Dandekar, W.N.( 1996), Fundamentals of Experimental Psychology Anmol Prakashan, 683, Budhwar Peth, Pune- 411002.