1. Comparative approaches to same/different abstract-concept learning

   • A. A. Wright
   • D. M. Kelly

   Outlook 14 April 2017 Pages: 323 - 324

2. Apes perform like infants in false-belief tasks

   • Thomas Bugnyar

   Outlook Open access 07 April 2017 Pages: 325 - 326

3. Numbers and brains

   • C. R. Gallistel

   Outlook 14 April 2017 Pages: 327 - 328

4. Editorial

   • Alex de Voogt
   • Lance Miller

   Editorial 04 August 2017 Pages: 329 - 329

5. Creating a common terminology for play behavior to increase cross-disciplinary research

   • Lance J. Miller

   OriginalPaper 12 July 2017 Pages: 330 - 334

6. Learning to play: A review and theoretical investigation of the developmental mechanisms and functions of cetacean play

   • Heather M. Hill
   • Sarah Dietrich
   • Briana Cappiello

   OriginalPaper 04 August 2017 Pages: 335 - 354

7. What is play fighting and what is it good for?

   • Sergio M. Pellis
   • Vivien C. Pellis

   Invited Review 03 April 2017 Pages: 355 - 366

   

8. The influence of breed and environmental factors on social and solitary play in dogs (Canis lupus familiaris)

   • Lindsay R. Mehrkam
   • Nathaniel J. Hall
   • Clive D. L. Wynne

   OriginalPaper 12 July 2017 Pages: 367 - 377

   

9. Integrating Tinbergen's inquiries: Mimicry and play in humans and other social mammals

   • Elisabetta Palagi
   • Chiara Scopa

   OriginalPaper 21 June 2017 Pages: 378 - 389

   

10. Social play as joint action: A framework to study the evolution of shared intentionality as an interactional achievement

    • Raphaela Heesen
    • Emilie Genty
    • Adrian Bangerter

    OriginalPaper 04 August 2017 Pages: 390 - 405

11. Strategic interactions: Games of the Ju|’hoan

    • Alex de Voogt

    OriginalPaper 27 June 2017 Pages: 406 - 413

    

12. Does chess instruction improve mathematical problem-solving ability? Two experimental studies with an active control group

    • Giovanni Sala
    • Fernand Gobet

    OriginalPaper Open access 23 June 2017 Pages: 414 - 421

    

13. Expanding the definitional criteria for imaginative play: Contributions of sociocultural perspectives

    • Artin Göncü
    • Jennifer A. Vadeboncoeur

    OriginalPaper 04 August 2017 Pages: 422 - 431

14. The psychological significance of play with imaginary companions in early childhood

    • Tracy R. Gleason

    OriginalPaper 13 July 2017 Pages: 432 - 440

15. The evolutionary significance of pretend play: Two-year-olds’ interpretation of behavioral cues

    • Lili Ma
    • Angeline S. Lillard

    OriginalPaper 13 July 2017 Pages: 441 - 448