POPULATION & SAMPES 0.0 / 5 ? PsychologyResearch methods and techniquesASAQA Created by: _Holly98Created on: 12-12-15 11:55 POPULATION & SAMPES POPULATION LARGE GROUP INDIVIDUALS TARGET POPULATION REPRESENTITIVE - GENERALISED CONTAIN SOME FORM OF BIAS 1 of 6 RANDOM SAMPLE SOPHISTIACTED EACH MEMBER EQUAL CHANCE BEING PICKED NAMES ASSINGED NUMBER - LOTTERY STRENGTH FREE BIAS WEAKNESS DIFFICULT / TIME CONSUMING UNREPRESENTIVE / MAY NOT WISH TAKE PART 2 of 6 SYSTEMATIC SAMPLE NTH MEMBER POPULATION SELECTED SAMPLE FRAME PRODUCED ALPHABETICAL ORDER - NOMINATED EVERY 3RD PERSON TILL COMPLETE STRENGTHS AVOID BIAS / NO INFLUENCE WHO IS CHOSEN FAIRLY REPRESENTITIVE WEAKNESS COMLETE REPRENSENTATION NOT POSSIBLE 3 of 6 STRATIFIED SAMPLING REFLECTS PROPORTION PEOPLE IN SUB GROUPS IDENTIFY STRARA PROPORTIONS WORKED OUT STRENGTHS AVOID BIAS - RANDOM AFTER STRATA REPRESENTITIVE REFLECT COMPOSITION POPULATION GENERALISATION WEAKNESS DOESNT REFLEC PEOPLE DIFFERENT 4 of 6 OPPURTUNITY SAMPLE ANYONE WILLING / CHANCE OR WHO IS AROUND STRENGTH CONVENIANT SAVE TIME / MONEY WEAKNESS BIAS - UNREPRESENTITIVE - CANT GENERALISE BIAS - RESARCHER CONTROL WHO PARTICIPATES 5 of 6 VOLOUNTEER SAMPLE PARTICPANTS SELECT THEMSELVES ADVERTISEMENT OR VOLOUNTEER WHEN ASKED STRENGTH EASY / MINIMAL EFFORT WEAKNESS CERTAIN PROFILE AFFECT GENERALISATION 6 of 6
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