PSYC 1010 Lecture Notes - Lecture 2: Central Tendency, Standard Deviation, Sept

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Rebecca Jubis

Document Summary

Expectation 1 behaviour 1 behaviour 2. Confirm someone has an expectation and behaves in a certain way, then he/she influences the behaviour of the next person and the second person has now an expectation that the initial person has. Where not only is the subject unaware of the hypothesis or experimental conditions but so is the experimenter. Types of descriptive: measures of central tendency (mean, median, mode) ** using mean not always the best measure to use, if one number is way out of range of other numbers this causes for inaccuracy: measures of variability; how much does scores spread out. Standard deviation: measures the average spread of scores (deviation) from the mean. It takes into account all scores in distribution. (difference from range is that it takes all scores rather than highest and lowest). The greater the variability on spread of scores the higher the s. d (standard deviation) Normal distribution: this is the hypothetical data. (theoretical)