That way the experimenter cannot be biased in

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: y the experimenter cannot be biased in interpreting participants’ behaviours and the participants’ behaviours cannot be influenced by knowledge of the study’s hypothesis.) 45 can be overcome through Placebo Controls which involve comparing the effectiveness of a treatment treatment for physical or psychological ailments against a phony treatment that is known to be ineffective. (Allows for separating the effect of participants’ expectations from the real effect of the treatment.) 46 The goal of an experimental study is to establish a causal association between variables that applies broadly (i.e., to all humans). BUT! An experimenter cannot run everyone through the study – it would take too long. 47 Population Population The group that the experimenter wants to generalize to (i.e., all humans, or all children, or people with red hair…) Sample The people that actually participates in the study. (some much smaller number of people than exist in the population) 48 If the experimenter would like their results to GENERALIZE (or consider them applicable) to the population as a whole, the sample must be REPRESENTATIVE (it must match the characteristics of the population as closely as possible on dimensions such as gender, age, ethnicity, social class, education, etc.) 49 50...
View Full Document

This note was uploaded on 01/16/2014 for the course PSYCH 1200 taught by Professor Dougalards-tomalin during the Fall '13 term at Manitoba.

Ask a homework question - tutors are online