Thinking can be characterized in terms of knowledge, skill, intention, performance and achievements of the individual. Language and thought are the basic vehicles of problem solving which initially and ultimately would depend on the individual himself, the information available to him, his competence to use that information, his intention or desire to achieve a particular goal, and the kind of activities he engages en route the goal.
Early experimental psychologists attempted to identify the fundamental building blocks of thought. Just as it is possible to understand a substance in terms of molecular structure, a molecule in terms of its atoms, or atoms in terms of its elementary particles, it should be possible to understand its behavior in terms of its fundamental components and some forms of associations among them. The analysis of the structure of thought has led psychologists in several different directions.