The effects of frequency, duration, and intensity on L2 learning through Duolingo

Keyphrases

• L2 Learning 100%
• Frequency Effect 100%
• Frequency-duration 100%
• L2 Grit 100%
• Duolingo 100%
• L2 Motivation 100%
• App Behavior 100%
• L2 Research 50%
• Second Language 50%
• Oral Proficiency 50%
• Natural Experiment 50%
• Self-determined 50%
• L2 Proficiency 50%
• Language Gain 50%
• Proficiency Gain 50%
• Ecological Validity 50%
• Practice Effects 50%
• Practice Distribution 50%
• App Usage 50%
• L2-gain 50%

Arts and Humanities

• GaIN 100%
• L2 learning 100%
• Oral 25%
• Proficiency 25%
• Second language 25%
• Ecological 25%
• Controlled 25%
• L2 proficiency 25%

Social Sciences

• Spanish 100%
• French 100%