Correction to: Scientific Reports https://doi.org/10.1038/s41598-019-52433-w, published online 05 November 2019

The HTML and PDF versions of this Article contained a typographical error in the spelling of the author Chu-Ren Huang, which was incorrectly given as Chu -Ren Huang.

In addition, the original version of this Article contained errors in the Abstract.

“Post exclusion, 95 native-language Mandarin speakers produced as many items that differed by a single lexical tone as possible within one minute.”.

now reads:

“Post exclusion, 95 native-language Mandarin speakers produced as many items that differed by a single segment or lexical tone as possible within one minute.”.

Lastly, the original article contains errors in the Methods section under the subheading ‘Fluency’.

“We introduce ‘weighted edit’ (WE), shown in Fig. 1b. WE states that a given word’s value to the final fluency score decreases as edit distance between itself and the auditory stimuli increases. Fluency weightings differed according to the number of units for each of the stimuli and production, such that weightings were the proportion of the number of edit distances possible prior to two items sharing no similarity. For instance, for four-unit stimuli that received five-unit responses, edit 1 garnered 1 point (e.g., wai4/uaɪ5151/→ shuai4/ʂuaɪ5151/), edit 2 = 0.75 (e.g., wai4/uaɪ5151/→ shuan4/ ʂuan5151/), edit 3 = 0.50 (e.g., wai4/uaɪ5151/→ xiang4/ɕiaŋ5151/), edit 4 = 0.25 (e.g., wai4/uai5151/→ xiang3/ɕiaŋ214/), and edit 5 = 0 (e.g., wai4/uaɪ5151/→ xiong3/ɕioŋ214/). Similarly, for three-unit stimuli that received two-unit responses, edit 1 = 1 (e.g., du2/tu3535/→ wu2/u3535/), edit 2 = 0.50 (e.g., tu2/tu3535/→ wu4/u5151/), edit 3 = 0 (e.g., tu2/tu3535/→ yi4/i5151/), edits 4 and 5 also received 0 points due to not being possible combinations.”

now reads:

“We introduce ‘weighted edit’ (WE), shown in Fig. 1b. WE states that a given word’s value to the final fluency score decreases as edit distance between itself and the auditory stimuli increases. Fluency weightings differed according to the number of units for each of the stimuli and production, such that weightings were the proportion of the number of edit distances possible prior to two items sharing no similarity. For instance, for four-unit stimuli that received five-unit responses, edit 1 garnered 1 point (e.g., wai4/uaɪ51/→ shuai4/ʂuaɪ51/), edit 2 = 0.75 (e.g., wai4/uaɪ51/→ shuan4/ʂuan51/), edit 3 = 0.50 (e.g., wai4/uaɪ51/→ xiang4/ɕiaŋ51/), edit 4 = 0.25 (e.g., wai4/uaɪ51/→ xiang3/ɕiaŋ214/), and edit 5 = 0 (e.g., wai4/uaɪ51/→ xiong3/ɕioŋ214/). Similarly, for three-unit stimuli that received two-unit responses, edit 1 = 1 (e.g., du2/tu35/→ wu2/u35/), edit 2 = 0.50 (e.g., tu2/tu35/→ wu4/u51/), edit 3 = 0 (e.g., tu2/tu35/→ yi4/i51/), edits 4 and 5 also received 0 points due to not being possible combinations.”

These errors have now been corrected in the PDF and HTML versions of the published Article.