{"schema":"record/v1","id":"art_01M5NPVMACTQ5K29YMNR4GMRKD","type":"article","revision":1,"etag":"\"r1.s0\"","title":"Does a more enthusiastic synthetic narrator improve learning from a narrated lesson?","summary":"Problem. Whether adding emotional cues to a TTS narrator helps viewers learn. Conditions. Between-subjects online experiment, n = 244 learners at a large Asian university, listening to Amazon Alexa narrating a multimedia lesson on a denial-of-service attack in a neutral, low-, medium- or high-enthusiasm voice. Measured result. Enthusiastic voices did not raise immediate retention or transfer scores over the neutral voice; medium and high voices were perceived as more enthusiastic; low and high enthusiasm lowered intrinsic and extraneous cognitive-load ratings; the medium voice raised positive emotion from baseline; persona ratings did not improve. Failure modes. Strong prosody can add load for non-native listeners (the authors' argument). Limitations. One 2022 voice product, one topic, university students, immediate tests only, no human-voice control, no words-per-minute figures extracted. Inference (labelled): richer TTS expressiveness is not shown to improve retention, so do not j...","status":"active","body":{"text":"Problem. Whether adding emotional cues to a TTS narrator helps viewers learn. Conditions. Between-subjects online experiment, n = 244 learners at a large Asian university, listening to Amazon Alexa narrating a multimedia lesson on a denial-of-service attack in a neutral, low-, medium- or high-enthusiasm voice. Measured result. Enthusiastic voices did not raise immediate retention or transfer scores over the neutral voice; medium and high voices were perceived as more enthusiastic; low and high enthusiasm lowered intrinsic and extraneous cognitive-load ratings; the medium voice raised positive emotion from baseline; persona ratings did not improve. Failure modes. Strong prosody can add load for non-native listeners (the authors' argument). Limitations. One 2022 voice product, one topic, university students, immediate tests only, no human-voice control, no words-per-minute figures extracted. Inference (labelled): richer TTS expressiveness is not shown to improve retention, so do not justify an expressive narrator by learning gains; judge it by listener load and preference tests (see TTS evaluation items C3-B081-G31-03 and C3-B570-13). Version/date. Accepted 20 Jul 2022.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Single study; the voice (Alexa 2022) is no longer representative of current TTS. The abstract's own wording is used; effect sizes were not extracted.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://www.ebi.ac.uk/europepmc/webservices/rest/PMC9361884/fullTextXML","note":"Abstract; Abstract; Abstract"}]},"categories":["T13","T20"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://www.ebi.ac.uk/europepmc/webservices/rest/PMC9361884/fullTextXML","claim":"Problem. Whether adding emotional cues to a TTS narrator helps viewers learn. Conditions. Between-subjects online experiment, n = 244 learners at a large Asian university, listening to Amazon Alexa narrating a multimedia lesson on a denial-of-service attack in a neutral, low-, medium- or high-enthusiasm voice. Measured result. Enthusiastic voices did not raise immediate retention or transfer scores over the neutral voice; medium and high voices were perceived as more enthusiastic; low and high enthusiasm lowered intrinsic and extraneous cognitive-load ratings; the medium voice raised positive emotion from baseline; persona ratings did not improve. Failure modes. Strong prosody can add load for non-native listeners (the authors' argument). Limitations. One 2022 voice product, one topic, university students, immediate tests only, no human-voice control, no words-per-minute figures extracted. Inference (labelled): richer TTS expressiveness is not shown to improve retention, so do not justify an expressive narrator by learning gains; judge it by listener load and preference tests (see TTS evaluation items C3-B081-G31-03 and C3-B570-13). Version/date. Accepted 20 Jul 2022.","locator":"Abstract; Abstract; Abstract","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-d97cb32478e3ff7cde210df0aeabc3299aa7d58a/record.json#p-d97cb32478e3ff7cde210df0aeabc3299aa7d58a/record","import_batch_id":"pipe-d8a6b554cf784e76780167d74251137585c0ce56","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-d8a6b554cf784e76780167d74251137585c0ce56","original":{"body":{"text":"Problem. Whether adding emotional cues to a TTS narrator helps viewers learn. Conditions. Between-subjects online experiment, n = 244 learners at a large Asian university, listening to Amazon Alexa narrating a multimedia lesson on a denial-of-service attack in a neutral, low-, medium- or high-enthusiasm voice. Measured result. Enthusiastic voices did not raise immediate retention or transfer scores over the neutral voice; medium and high voices were perceived as more enthusiastic; low and high enthusiasm lowered intrinsic and extraneous cognitive-load ratings; the medium voice raised positive emotion from baseline; persona ratings did not improve. Failure modes. Strong prosody can add load for non-native listeners (the authors' argument). Limitations. One 2022 voice product, one topic, university students, immediate tests only, no human-voice control, no words-per-minute figures extracted. Inference (labelled): richer TTS expressiveness is not shown to improve retention, so do not justify an expressive narrator by learning gains; judge it by listener load and preference tests (see TTS evaluation items C3-B081-G31-03 and C3-B570-13). Version/date. Accepted 20 Jul 2022.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Single study; the voice (Alexa 2022) is no longer representative of current TTS. The abstract's own wording is used; effect sizes were not extracted.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://www.ebi.ac.uk/europepmc/webservices/rest/PMC9361884/fullTextXML","note":"Abstract; Abstract; Abstract"}]},"tags":[],"type":"article","links":[],"title":"Does a more enthusiastic synthetic narrator improve learning from a narrated lesson?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Problem. Whether adding emotional cues to a TTS narrator helps viewers learn. Conditions. Between-subjects online experiment, n = 244 learners at a large Asian university, listening to Amazon Alexa narrating a multimedia lesson on a denial-of-service attack in a neutral, low-, medium- or high-enthusiasm voice. Measured result. Enthusiastic voices did not raise immediate retention or transfer scores over the neutral voice; medium and high voices were perceived as more enthusiastic; low and high enthusiasm lowered intrinsic and extraneous cognitive-load ratings; the medium voice raised positive emotion from baseline; persona ratings did not improve. Failure modes. Strong prosody can add load for non-native listeners (the authors' argument). Limitations. One 2022 voice product, one topic, university students, immediate tests only, no human-voice control, no words-per-minute figures extracted. Inference (labelled): richer TTS expressiveness is not shown to improve retention, so do not j...","evidence":{"claims":[{"url":"https://www.ebi.ac.uk/europepmc/webservices/rest/PMC9361884/fullTextXML","claim":"Problem. Whether adding emotional cues to a TTS narrator helps viewers learn. Conditions. Between-subjects online experiment, n = 244 learners at a large Asian university, listening to Amazon Alexa narrating a multimedia lesson on a denial-of-service attack in a neutral, low-, medium- or high-enthusiasm voice. Measured result. Enthusiastic voices did not raise immediate retention or transfer scores over the neutral voice; medium and high voices were perceived as more enthusiastic; low and high enthusiasm lowered intrinsic and extraneous cognitive-load ratings; the medium voice raised positive emotion from baseline; persona ratings did not improve. Failure modes. Strong prosody can add load for non-native listeners (the authors' argument). Limitations. One 2022 voice product, one topic, university students, immediate tests only, no human-voice control, no words-per-minute figures extracted. Inference (labelled): richer TTS expressiveness is not shown to improve retention, so do not justify an expressive narrator by learning gains; judge it by listener load and preference tests (see TTS evaluation items C3-B081-G31-03 and C3-B570-13). Version/date. Accepted 20 Jul 2022.","locator":"Abstract; Abstract; Abstract","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T13","T20"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":1,"topic_ids":["CAT:T06.AIC.09","CAT:T20.04"],"confidence":"Single study; the voice (Alexa 2022) is no longer representative of current TTS. 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