In a longitudinal intervention study, the effects of phonological trainingwith articulation for children in a preschool class were analyzed.In total, 69 students participated, divided into an experimental groupof 39 and a comparison group of 30 students.The intervention consisted of phonological training with articulationand lasted throughout the preschool class year; in total, 2700 minuteswere spent on this training for the experimental group. All participantswere tested individually on pre-reading skills on four test occasions:before the intervention started, mid-term, immediately after the end ofthe intervention and, finally, a follow-up 6 months after the interventionwas completed.Based on their pre-reading skills, the participants were divided intotwo different subgroups, those at risk of developing reading difficultiesand those not at risk. The results showed greater progress at the follow-up test of both the at-risk and not-at-risk subgroups of the experimentgroup in word decoding and phonological ability than the comparisongroup. The positive results applied both to speech-sounds andwords included in the training program as well as new speech soundsand words not included in the program, thus providing evidence fortransfer effects.