| # | Title | Name | Region | Comment | Date |
|---|---|---|---|---|---|
| 501 | Dr. | Bridget Copley | France | N/G | May 21, 2013 |
| 502 | Ms | Ruth Michaels | Canada | N/G | May 21, 2013 |
| 503 | Dr | John Baker | Canada | N/G | May 21, 2013 |
| 504 | Ms | Badea Camelia | Romania | N/G | May 22, 2013 |
| 505 | Dr. | Andras Pap | Hungary | N/G | May 22, 2013 |
| 506 | dr | alexandra kowalski | Hungary | N/G | May 22, 2013 |
| 507 | Dr | Isabelle Roy | France | N/G | May 23, 2013 |
| 508 | Dr | Stefania Arcara | Italy | N/G | May 24, 2013 |
| 509 | Ms | Anonymous | Spain | N/G | Jun 02, 2013 |
| 510 | None | Anonymous | UK | N/G | Jun 26, 2013 |
| 511 | Professor | Nigel Brown | UK | View | Jun 30, 2013 |
| 512 | Dr | Vicky Schneider-Gricar | UK | N/G | Jun 30, 2013 |
| 513 | Mr | Matthew Facciani | USA | N/G | Jul 01, 2013 |
| 514 | Dr | Valeria de Paiva | USA | N/G | Jul 06, 2013 |
| 515 | Prof | Jennifer Groh | USA | N/G | Aug 03, 2013 |
| 516 | DR | Michele A Basso | USA | N/G | Aug 03, 2013 |
| 517 | Dr | Hyejin Youn | USA | View | Aug 08, 2013 |
| 518 | Ms | Anna Sara Romoren | Netherlands | N/G | Aug 14, 2013 |
| 519 | Dr | Helen Tager-Flusberg | USA | N/G | Aug 14, 2013 |
| 520 | Dr. | Brenda Beverly | USA | N/G | Aug 14, 2013 |
| 521 | Pr. | Jean-Pierre Chevrot | France | N/G | Aug 14, 2013 |
| 522 | Dr | Sara Finley | USA | N/G | Aug 15, 2013 |
| 523 | Dr. | Krista Byers-Heinlein | Canada | N/G | Aug 15, 2013 |
| 524 | Dr | Isabelle Barriere | USA | N/G | Aug 16, 2013 |
| 525 | Prof. | Sally Sedgwick | USA | N/G | Aug 20, 2013 |
| 526 | Dr | Jin Montclare | USA | N/G | Aug 27, 2013 |
| 527 | Dr | Darren Bradley | USA | N/G | Sep 06, 2013 |
| 528 | Ms | Darcy Buerkle | USA | N/G | Sep 07, 2013 |
| 529 | Dr | Elisa de Castro | Spain | N/G | Sep 16, 2013 |
| 530 | dr | Jesica Levingston | USA | N/G | Sep 17, 2013 |
| 531 | Dr | Rachel Palmen | Spain | N/G | Sep 23, 2013 |
| 532 | Mrs. | Jessica Gupta | USA | View | Sep 25, 2013 |
| 533 | Prof | Ian Gent | UK | View | Oct 22, 2013 |
| 534 | Ms | Anonymous | Portugal | N/G | Oct 22, 2013 |
| 535 | Dr | Tessa Berg | UK | N/G | Nov 13, 2013 |
| 536 | Ms | Pilar Mendoza | Spain | N/G | Nov 15, 2013 |
| 537 | Dr | Randi Martin | USA | N/G | Nov 15, 2013 |
| 538 | Dr. | Angelika Kratzer | USA | N/G | Nov 23, 2013 |
| 539 | Dr | Jessica Rett | USA | N/G | Nov 24, 2013 |
| 540 | Dr | E. Allyn Smith | Canada | N/G | Nov 24, 2013 |
| 541 | Prof. Dr. | Kai von Fintel | USA | N/G | Nov 25, 2013 |
| 542 | Mr | Michael Yoshitaka Erlewine | USA | N/G | Nov 25, 2013 |
| 543 | Dr | Rick Nouwen | Netherlands | N/G | Nov 25, 2013 |
| 544 | Prof | Branden Fitelson | USA | N/G | Nov 25, 2013 |
| 545 | Ms | Anonymous | USA | N/G | Nov 25, 2013 |
| 546 | Dr. | Sarah Ouwayda | Switzerland | N/G | Nov 26, 2013 |
| 547 | Professor | Nick Enfield | Netherlands | N/G | Nov 28, 2013 |
| 548 | Dr. | Eszter Beran | Hungary | N/G | Jan 18, 2014 |
| 549 | Prof. | István Winkler | Hungary | N/G | Jan 19, 2014 |
| 550 | Dr | Tom Campbell | Finland | N/G | Jan 19, 2014 |
- S/C/P - State, County or Province
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- Anonymous signatures signify people who have chosen not to display their names publicly
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