Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Supported by

[Solved] Timing glitch?

edited October 2021 in OpenSesame

Good afternoon everyone,


I have a question about a possible timing glitch. I'm developing an OS experiment, but I have the feeling some items appear sooner than they should. What could I do to fix this?

Experiment setup:

Participants first hear the first syllable of a Spanish word over their headphones (e.g. SÁ_), and at the word offset they see a word on a screen which is either a complete match (SÁBADO), a match but with stress on a different syllable (e.g. SALÓN), a mismatch (e.g. MOSQUITO) or a non-word (e.g. FÍTULA). They need to judge whether the word exists in Spanish or not, yes or no (SÍ/NO). Presumably their response time is faster when seeing the matching prime (the target word would have been primed in their minds).

Open Sesame situation:

Four asterisks are presented in the middle of a screen ****. This is a sketchpad item, duration 0 ms. The next item plays an audio file, duration 'sound'. As the duration of the sketchpad item is 0 ms, the asterisks and the audio file are presented simultaneously, and the presentation of these items takes as long as the audio file takes to play (because: duration 'sound').

Then the target word is presented in the middle of the screen. This is a sketchpad item, [target_word], but it's often presented before the audio file has stopped playing.

Why is this and what can I do to remedy it?


Many thanks in advance,

Daan

Comments

  • So to be clear: [target_word] should be presented the moment the audio item stops, not before it.

  • Hi @DPvanSoeren,

    Thanks for your post and the description of the problem. It is difficult to ascertain where the problem lies without seeing how you're implementing the task but I believe that it originates in the way you set it up.

    I built a basic task following the sequence of events you described and I get the target word to appear at the sound's offset, not before. This is how my sound event is set up:

    There must be something specific to your task or your sound files (do they play in full when you play them in a different application? Is the problem occurring if you use sounds in a different format? Have you tried varying what follows the sound object to work out in what circumstances the problem occurs?). Have you checked the time stamps of the sound and target word objects in the log? That would tell you for sure when these objects start so that you could assess how often the problem occurs and whether it does so randomly or under certain circumstances.

    I attach my basic example so that you can see how I implement it and compare it to yours. It works without any timing problem whichever back-end I select.

    Incidentally, I also included code that counterbalances the response keys across subjects (thought it might be useful if you haven't implemented that yet).

    Let me know if that helps.

    Good luck!

    Fabrice.

    Example task:

    Buy Me A Coffee

  • Hello @Fabrice,

    Thank you very much for your help (and sorry for the late reply). Things seem to be working fine now.

    I've also had a look at the need/possibility to counterbalance the response keys but I think for my particular experiment it's not necessary -- I'll only be looking at the SÍ-responses anyway. NO-responses are only relevant because I need a NO-condition in my experiment.

    It did inspire me to counterbalance something else though, so many thanks again.

    I'm treating you to a coffee or two!

    Kind regards,

    Daan

  • @Fab : you're psyfab?

  • Hi @DPvanSoeren,

    Glad I could help and that your task is now working! And thanks for the coffee! 😀 (Yes, psyfab is my name on buymeacoffee).

    Good luck with your experiment!

    Fabrice.

    Buy Me A Coffee

Sign In or Register to comment.

agen judi bola , sportbook, casino, togel, number game, singapore, tangkas, basket, slot, poker, dominoqq, agen bola. Semua permainan bisa dimainkan hanya dengan 1 ID. minimal deposit 50.000 ,- bonus cashback hingga 10% , diskon togel hingga 66% bisa bermain di android dan IOS kapanpun dan dimana pun. poker , bandarq , aduq, domino qq , dominobet. Semua permainan bisa dimainkan hanya dengan 1 ID. minimal deposit 10.000 ,- bonus turnover 0.5% dan bonus referral 20%. Bonus - bonus yang dihadirkan bisa terbilang cukup tinggi dan memuaskan, anda hanya perlu memasang pada situs yang memberikan bursa pasaran terbaik yaitu http://45.77.173.118/ Bola168. Situs penyedia segala jenis permainan poker online kini semakin banyak ditemukan di Internet, salah satunya TahunQQ merupakan situs Agen Judi Domino66 Dan BandarQ Terpercaya yang mampu memberikan banyak provit bagi bettornya. Permainan Yang Di Sediakan Dewi365 Juga sangat banyak Dan menarik dan Peluang untuk memenangkan Taruhan Judi online ini juga sangat mudah . Mainkan Segera Taruhan Sportbook anda bersama Agen Judi Bola Bersama Dewi365 Kemenangan Anda Berapa pun akan Terbayarkan. Tersedia 9 macam permainan seru yang bisa kamu mainkan hanya di dalam 1 ID saja. Permainan seru yang tersedia seperti Poker, Domino QQ Dan juga BandarQ Online. Semuanya tersedia lengkap hanya di ABGQQ. Situs ABGQQ sangat mudah dimenangkan, kamu juga akan mendapatkan mega bonus dan setiap pemain berhak mendapatkan cashback mingguan. ABGQQ juga telah diakui sebagai Bandar Domino Online yang menjamin sistem FAIR PLAY disetiap permainan yang bisa dimainkan dengan deposit minimal hanya Rp.25.000. DEWI365 adalah Bandar Judi Bola Terpercaya & resmi dan terpercaya di indonesia. Situs judi bola ini menyediakan fasilitas bagi anda untuk dapat bermain memainkan permainan judi bola. Didalam situs ini memiliki berbagai permainan taruhan bola terlengkap seperti Sbobet, yang membuat DEWI365 menjadi situs judi bola terbaik dan terpercaya di Indonesia. Tentunya sebagai situs yang bertugas sebagai Bandar Poker Online pastinya akan berusaha untuk menjaga semua informasi dan keamanan yang terdapat di POKERQQ13. Kotakqq adalah situs Judi Poker Online Terpercayayang menyediakan 9 jenis permainan sakong online, dominoqq, domino99, bandarq, bandar ceme, aduq, poker online, bandar poker, balak66, perang baccarat, dan capsa susun. Dengan minimal deposit withdraw 15.000 Anda sudah bisa memainkan semua permaina pkv games di situs kami. Jackpot besar,Win rate tinggi, Fair play, PKV Games