When two tasks performed simultaneously share common processing resources at the perceptual, cognitive or response level, they interfere with each other. This interference results in degraded performance in one or both tasks. Beyond the concept of resource sharing, interference at the response level may arise when the tasks share the same or highly similar response types, even within the same modality (e.g., the same key press for both tasks). Recent studies suggest that the Stroop task may in fact be a dual task situation. When the stimulus is a word, the reading process is automatically activated during the color-naming task. Reading and color naming share common resources which contributes to the interference. We hypothesized that greater response type discriminability would reduce the interference of reading on color naming. In total 92 participants completed a Stroop task under one of the four conditions: a baseline with the same hand and keyboard keys for both tasks and three experimental conditions in which response types differed either by hand, motor action, or response modality. Subjective workload was assessed with the NASA-TLX at the end of the experiment. 3 mixed ANOVA were conducted, with item type (word vs. string of characters) as the within-subject factor and response condition (baseline vs. one of the three experimental conditions) as the between-subjects factor. Results supported our hypothesis: interference was significantly reduced in all three experimental conditions compared to the baseline. NASA-TLX scores did not differ across conditions. These results suggest that, even within the same response modality, the level of discriminability between response types contributes to the interference. These findings highlight the importance of using different response types across tasks in multitasking contexts. Moreover, using multiple distinct response types did not increase subjective workload, further underlining the importance of varying response types between tasks.