My research included the elements of a Case Study Type III, a cross-sectional case study, cross-case analysis, and a building block case study. It consisted of a series of four experiments to study humor perception and memorization. Both the within-subjects and between-subject experimental designs were applied, together with a factorial experimental design. A computerized method (Continuous Visual Recognition Task) from Vienna Test System (a classical or apparatus experiment), free associations technique, and unintentional recall of three funny stories and of a short text evoking positive emotions (a diagnostic experiment) were used. This study was conducted as a part of educational process of experimental psychology. Readers can learn how a case study permits the use of several research methods. In addition, readers can learn how to differentiate several experimental designs (the within-subjects and between-subject experimental designs, the factorial experimental design), what the difference is between a classical or apparatus experiment and a diagnostic experiment, as well as what is common between some types of case study—a Case Study Type III, a cross-sectional case study, cross-case analysis, and a building block case study.