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This paper reports the results of a portion of a more comprehensive study on the effect of correction for random error of measurement in both the criterion and the predictor and/or various forms of restriction of range on the parameters [e.g. p[X,Y], β[Y|X], σ[Y|X]] required to specify and justify a selection  procedure. The objective of this paper is to determine the effect of a joint correction for criterion unreliability and Case 2 restriction of range on the validity coefficient. Results are depicted graphically and discussed.<p>  <strong>Opsomming</strong>  Hierdie artikel rapporteer die resultate van 'n gedeelte van 'n meer omvattende studie oor die effek van korreksies vir toevallige metingsfout in beide die kriterium sowel as die voorspeller en/of verskeie vorms van inperking van variasiewydte op die parameters [bv. p[X,Y], β[Y|X], σ[Y|X]] wat vereis word ten einde 'n seleksieprosedure te spesifiseer en te regverdig. Die doel met die artikel is om die effek van die gesamenflike korreksie vir kriteriumonbetroubaarheid en Tipe 2 inperking van variasiewydte op die geldigheidskoeffisient te bepaal. Resultate word grafies voorgestel en omskryf

The effects of a joint correction for the attenuating effect of criterion unreliability and case 2 restriction of range on the validity coefficient