The online effects of processing instruction on the acquisition of the English passive structure

This study investigates the immediate and delayed effects of processing instruction (PI), which is an input-based pedagogical intervention, and its key component, structured input (SI), which aims to foster making correct form-meaning connections, on the acquisition of the English passive structure. Thirty-four ESL learners, who had not received any formal instruction on the target structure, were randomly assigned to either a PI group (n = 12), SI group (n = 12), or Control group (n = 10). Both the PI and SI groups received 1 hour of computer-based instruction, while the control group did not receive any instruction. A self-paced reading test was used to measure the accuracy of response and response time in selecting the correct pictures. The test was administered before instruction, immediately after instruction, and 3 weeks later. The results indicated that both the PI and SI groups improved significantly in accuracy on both posttests, while the control group did not. No significant gains, however, were found in response time for any of the groups on any of the posttests, although the PI group was comparatively faster than the SI group on the immediate posttest.