Ideas of reference

Ideas of reference or delusions of reference involve a person having a belief or perception that irrelevant, unrelated or innocuous things in the world are referring to them directly or have special personal significance.

Intelligence

Intelligence is usually said to involve mental capabilities such as the ability to reason, plan, solve problems, think abstractly, comprehend ideas and language, and learn.

Intentionality

Intentionality, originally a concept from scholastic philosophy, was reintroduced in contemporary philosophy by the philosopher and psychologist Franz Brentano in his work Psychologie vom Empirischen Standpunkte.

Introspective

Introspective is the fourth album, the third of entirely new music, by the UK electronic music group Pet Shop Boys. It was first released in 1988 Introspective is a dance album, like Disco, but unlike Disco, the songs are new, not remixes of old songs. It is so named because "all the songs, although it's a dance album, are introspective".

Introversion

The terms Introvert and Extrovert (spelled Extravert by Carl Jung), were originally employed by Sigmund Freud and given significant amplification later by Jung. The terms refer to "attitudes" and show how a person orients and receives their energy.

IQ

An intelligence quotient or IQ is a score derived from a set of standardized tests that were developed with the purpose of measuring a person's cognitive abilities ("intelligence") in relation to their age group. IQ tests do not measure intelligence the way a ruler measures height, but rather the way a race measures speed.