Particularităţi Ale Statisticii Psihologice

Statistic procedures are used for creating and verifying work hypotheses useful for decision grounding. Each aspect of human activity is measured and interpreted in statistic terms, which means it is measured in a numeric manner and interpreted as a means. Absorbed by the power of numbers, we are under the impression that only by knowing them we can master phenomena and events. Through specific procedures, statistics hold what is essential and logic for obtaining statistic markers and finding regularities in rules and tendencies in evolution of phenomena. Theoretic statistics have as a goal defining the basis and the gnoseological functions of the general system of statistic markers, of the observation methods. Basic concepts of mathematical statistics represent the frequency of an event or a characteristic of a population, the law of percentile or distribution of a measure, a measure’s variability or stability, correlations or connections between two or more characteristic, statistic markers. The concepts of statistic or probability field, average, deviation, pooled standard deviation, statistic or random variable, percentile function, independent or dependent, correlation or regression, that are connected to random processes, elaborated by probability theory, serve as fundamental elements in mathematical statistics and in creating its specific theories. Selection and estimation theory, signification theory, decision theory and prediction are some of them. Statistics is concerned with recording, describing and analyzing data for reaching to some (inferential) conclusions using it. Data is obtained by categorizing, counting or measuring psychological events based on using adequate methods. In its essence, statistics works with numbers that describe our surrounding reality, using for this different categories of numeric markers. Contrary to mathematical statistics, under methodological report, social statistics has the same characteristics: - Its studies are always concrete and are based on empirical knowledge; - Social phenomena variability is much more ample due to the combination of causal factors; this present article is an example of this variability in the field of psychology.