This study summarizes the development and the application of a four-week repeated assessment scale that was designed to measure the advanced writing skills of college students. The storyline was written by the first author and required respondents to write one or more sentences to the given developing storyline of the week. Each week's narrative was written to tell a part of a story that integrates into a single storyline over the weeks. For the application, each week, the respondents from a volunteered sample of 74 were asked 1) to write to a continuation to the developing storyline of the week (the instruction stated that this was the first or the second or the third or the last part of the storyline) and 2) to rate their overall mood that week (1 to 5, 5 indicating a great mood). Writings of the students (responses) were then coded by multiple raters with respect to three subskill components; namely expression, aesthetics, and creativity. The hypothesized tie between the fluctuations observed in the sense of well-being and the writing performance of the students over the weeks and whether and to what extent the creativity subcomponent was more subject to the influence of student's mood changes when compared to the clarity of expression or the aesthetics subskill. However, the results show that when the changes in writing performances of the whole group were examined instead of that of individuals over time, there were no significant differences to be found. It is recommended that it might be more useful than the classical one-shot assessment design.