... 168 71 t-test 211two-sample tests 204±8experiment, Piagetian 90experimental design 67 75 between-subject (independent) 74 ±5ex post facto 70 laboratory and field 75 types 74 ±5validity 87 90within-subjects ... 4errors 27, 81, 103, 160, 177 , 231estimation 1 57, 160, 176 , 223ethics 59, 70 , 74 , 232, 239±45ethnography 52ethnomethodology 8, 52ethnoscience 52evaluation of programmes 76 Everington, C. ... ideasand coming to a conclusion. But we are not ended there. Research alsohas to be presented to readers ± to an audience. Those readers and thataudience have to be able to understand your research. ...