Which of the following is NOT one of Guba & Lincoln's criteria for trustworthiness in qualitative research?

The question asks to identify which option is not a component of Guba & Lincoln's criterion for "trustworthiness" in qualitative research.

Guba and Lincoln (1985) proposed four criteria for establishing trustworthiness in qualitative research:

• Credibility: This refers to the confidence in the "truth" of the findings.
• Transferability: This refers to the degree to which the findings can be applied to other contexts or settings.
• Dependability: This refers to the consistency and stability of the findings over time and across different researchers.
• Confirmability: This refers to the neutrality or objectivity of the findings, ensuring they are not biased by the researcher's perspective.

Comparing these with the given options:

• a. Dependability is a component.
• b. Transferability is a component.
• c. Measurability is not a component. Measurability is typically associated with quantitative research, focusing on the ability to quantify variables.
• d. Credibility is a component.

Therefore, "Measurability" is the option that is not a component of Guba & Lincoln's trustworthiness criteria.

The final answer is $\boxed{\text{c. Measurability}}$