( ( Since ( ( in practice ) ( , ( there ( are ( ( many ( other factors ) ) ( that ( will ( affect ( ( the quality ) ( of ( ( an experiment ) ( -LRB- ( ( ( e.g. , ) ( ( the ( measurement reliability ) ) ( for ( the ( dependent variable ) ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) ) ) ) ) ) ( , ( we ( generally ( ( recommend ( that ( you ( use ( the ( D ( optimality criterion ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (IN Since) (S (PP (IN in) (NP (NN practice))) (, ,) (NP (EX there)) (VP (VBP are) (NP (NP (JJ many) (JJ other) (NNS factors)) (SBAR (WHNP (WDT that)) (S (VP (MD will) (VP (VB affect) (NP (NP (DT the) (NN quality)) (PP (IN of) (NP (NP (DT an) (NN experiment)) (PRN (-LRB- -LRB-) (NP (NP (NNP e.g.)) (, ,) (NP (NP (DT the) (NN measurement) (NN reliability)) (PP (IN for) (NP (DT the) (JJ dependent) (NN variable))))) (-RRB- -RRB-))))))))))))) (, ,) (NP (PRP we)) (ADVP (RB generally)) (VP (VBP recommend) (SBAR (IN that) (S (NP (PRP you)) (VP (VBP use) (NP (DT the) (NNP D) (NN optimality) (NN criterion)))))) (. .)))
Since in practice, there are many other factors that will affect the quality of an experiment (e.g., the measurement reliability for the dependent variable), we generally recommend that you use the D optimality criterion.
(ROOT (S (NP (JJ Dependent) (NN variable)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (VBN affected) (NN factor)) (PP (IN in) (NP (DT an) (NN experiment))))))) (. .)))