3.3.1 Types of PD NeedsThe respondents showed a moderate level of PD needs. The most valued PD types involved 1) three to five days of training, seminars or conferences, 2) study trips in Thailand and overseas and 3) furthering their study either in Thailand or overseas (mean scores: 3.59-3.38). The respondents showed the least attention to the two to three month training courses (mean = 2.79).