本研究旨在探討受督導者於督導過程中對訊息隱藏未揭露的現象，主要瞭解隱而未說的內涵及其對督導過程的影響。6位碩士層級諮商員各接受4至6次督導，並於每次督導結束後立即接受督導歷程回溯訪談。研究結果發現，受督導者於每次督導過程均有訊息隱藏未揭露，在整個督導歷程中，以第1次督導出現的隱而未說最多，之後隨著督導次數的增加有普遍下降的趨勢，平均每位受督導者每次督導有3.96個隱而未說。隱而未說的內涵以與「督導者及受督導者的互動」有關的訊息最多，其中又以對督導者的負向情緒與負向評價佔最高比例，隱而未說對督導過程的影響均為負向，其中又以「降低受督導者所能獲得的協助」為最普遍。最後，除了正向情緒與對督導者的正向評價沒有負向影響之外，其他類別的隱而未說均對督導過程有負向影響，而且最重要的影響都是降低受督導者所能獲得的協助，此外不同類別的隱而未說也有不同的影響組型。

The purpose of this study was to investigate nondisclosure of supervisees in supervisory process. Six counselors of master degree in practicum were supervised from four to six times. Each time when supervision ended, they were interviewed immediately, while watching the videotapes of the supervisory process. According to the results, nondisclosure of supervisees occurred in each supervisory session. However, the first session of the whole supervisory process had the highest frequency of nondisclosure. With supervision proceeded, the nondisclosure has the tendency of decline. Averagely, each supervisee had 3.96 nondisclosures in each session. The most common nondisclosures were the information related interaction between supervisor and supervisee. Within them, negative emotions and evaluations toward supervisor were most popular. The effects of nondisclosures all were negative, especially centered on professional learning as a counselor. At last, except both positive emotion and positive evaluation on supervisor did not have any negative effects, the other categories of nondisclosures all had such effects and their most significant effect was on professional learning as a counselor. At the same time, different categories of nondisclosures had different effect patterns