Several studies have asserted that the performance of verbal fluency task is strongly influenced by the socio-culture and language aspect. In the letter fluency task, participants are asked to generate words beginning with the letters P, A, S, (so-called PAS (ask), which has been widely used in English language. However it might not be equally suitable to other languages. Present study evaluates different kinds of letter and semantic fluency stimuli factors as pail of the preparation to develop the Indonesian verbal fluency task. Results show that the letters A and S produced many different words and are positioned in the top ten ranking, which is consistent with the results of the verbal fluency research on English and Portuguese languages. However, the letter F did not meet these results. Meanwhile, for semantic fluency, animal naming seems to be the most frequently used verbal fluency stimuli in many languages. This preliminary research is expected to be a good starting point to explore many aspects of verbal fluency for Indonesian that have not been answered yet

Key words: Indonesian, verbal fluency, letter fluency, semantic fluency