Effects of phonetically variable input (PVI) for processing instruction (PI) training and the number of training items were tested with a picture-selection eye-tracking task. Intermediate second language (L2) learners of French (n = 174) were tested before and after they received either a short (24 items), medium (48), or long (96) training on the causative structure with either single- or multivoice input. PI improved picture-selection accuracy from about 10% to above 50% regardless of the training size. Eye-tracking data showed a reduction in looks to the incorrect picture only after the short and medium training: it surfaced regardless of voice variability after the short training, whereas multivoice training led to a greater reduction after the medium training. Long training did not yield a reliable reduction of incorrect looks regardless of voice variability. Taken together, PVI does not hinder L2 syntactic learning. Learners may benefit more from a relatively shorter training with PVI.

语音变量输入 (PVI) 对处理指令 (PI) 训练的影响和训练项目的数量通过图片选择眼动追踪任务进行测试。法语中级第二语言 (L2) 学习者 (n = 174) 在接受单声部或多声部因果结构的短期 (24 项)、中度 (48) 或长期 (96) 培训之前和之后进行了测试输入。无论训练规模如何，PI 将图片选择准确率从大约 10% 提高到 50% 以上。眼动追踪数据显示，仅在短期和中期训练后，错误图片的外观减少：短期训练后无论语音变异性如何，它都会浮出水面，而多声部训练在中期训练后导致更大的减少。无论声音变化如何，长时间的训练都不能可靠地减少不正确的表情。综上所述，PVI 不会阻碍 L2 句法学习。学习者可能会从相对较短的 PVI 培训中受益更多。