PSYB04H3 Lecture Notes - Lecture 2: Scatter Plot, Negative Number, Statistical Significance
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Lecture 2 interrogation tools (three claims and four validities: claims: Gpa"s tha(cid:374) stude(cid:374)ts (cid:449)ho do(cid:374)"t (cid:449)ork outside s(cid:272)hool. The (cid:448)aria(cid:271)les are the (cid:374)u(cid:373)(cid:271)er of hours the student works and their gpa, constant is that everyone is a student: variable vs. constant depends on the study. A study shows that part-time students who (cid:449)ork up to 20 hours a (cid:449)eek ha(cid:448)e (cid:271)etter gpa"s tha(cid:374) full-ti(cid:373)e a(cid:374)d part ti(cid:373)e stude(cid:374)ts (cid:449)ho do(cid:374)"t work outside school. Variables is number of hours of work, gpa and students status which is a variable in the first one but a constant in the second: constant often = control variable, stays the same. In the study of the relationship btw work and. Gpa, (cid:449)hat (cid:374)eeds to (cid:271)e held (cid:272)o(cid:374)sta(cid:374)t, or (cid:862)(cid:272)o(cid:374)trolled for(cid:863): eg. ) This can be quite simple, or very difficult: easy: height, weight, reading speed and visual acuity, moderate: aggressiveness, pain, reading comprehension and academic status, difficult: sportsmanship, friendship, wisdom and group cohesion.
