original_query: What evidence supports the validity and reliability of the MLQ5X?
query: What evidence supports the validity and reliability of the MLQ5X?
answer: Subsequent validation work by John Antonakis and his colleagues provided strong evidence supporting the validity and reliability of the MLQ5X.  Antonakis confirmed the viability of the proposed nine-factor MLQ model using two very large samples. Since 2003, no one has provided dis-confirming evidence of the theorized nine-factor model with such large sample sizes.