If you record facial expression you can analyze it with some software for emotion recognition such as Noldus FaceReader or Emotient. Here is a clip from our study where we used FaceReader (you will see the FaceReader output towards the end of the clip)

https://www.youtube.com/watch?v=4OYQe4A3BMc Alternatively you can use facial EMG to record facial motor activity indicative of smiles, frowns, etc. The last thing I can think of is to use a rating dial or a rating scale - but it is always a problem for participants to remember about adjusting it continously. If you use Presentation to develop the experimental procedure you can use any USB device as the rating dial (e.g. PC joystick or a mouse). Best of luck!

Thanks Lukasz, I was thinking more along the lines of software approximating a Rating Dial. I will check out "Presentation."

You could quite comfortably do this in Inquisit if you are happy for a fully digital implementation. Using the video example, you'd present a video as a background stimulus in a block with a timeout beyond the videos duration. Then, you'd have looping trials that listen for a response. On the first of these trials start a variable that tracks elapsed time from this point (i.e., the videos start). The response could be a button press (using numeric keys), arrows, it could have a visual implementation of a rating dial that is (easy version) moved to the location clicked on by the participant or (hard version) dragged by the participant to the value of choice. You'd then have continuous responses and a timestamp that corresponds to video time.

I've done this kind of thing before for continuous button tapping in line with the beat of music and for continuous self-report of mind wandering during other tasks. Haven't done it with rating dials, but it should be conceptually similar.

Usually, subjext's affect can be measured by measuring several physiological instinctive reactions which represent the psyschosomatical response to emotions. In substance, I'm talking about something like skin impedance, myoelectrical activity of several face muscles, salive production, eye movements, variation of breath rythm, and so on. There are some SW/HW commercial products, but, I think, it is very difficult to find exactly the apparatuses you'll really need for your experiements. May be, some good biomedical engineers could help you very well in this matter. ASC (Analog Signal Conditioning), ADC (Analog-to-digital Conversion), CI/OI (Computer I/O Interfacing), SW development are questions not easy to resolve by any body. Who is answering you, that's me, is a Biomedical Signal Processing teacher at the University of Roma Sapienza (Italy) and my students have to work hard in order to learn how to get the right solutions to the biological, psychological, medical, clinical problems as such you are posing in this Research Gate site. Good luck!

I'm collecting online symptom ratings in my experiments. Participants usually see a vertical rating scale on the screen and are asked to continuously evaluate their symptoms with either mouse (click or scroll-wheel) or a dial. To run experiments and record responses we use a program called Affect (http://fac.ppw.kuleuven.be/clep/affect4/). Good luck!

Article Affect 4.0

I've done some more research into this and have found that the following software packages have been used:

ELAN: http://tla.mpi.nl/tools/tla-tools/elan/

ANVIL: http://www.anvil-software.org/#

gTrace: http://emotion-research.net/toolbox/toolboxlabellingtool.2011-07-08.0084929013

EmuJoy: http://sourceforge.net/projects/emujoy/

I wasn't able to find a piece of software that met my needs, so I created my own and have released an open source version: https://carma.codeplex.com/

Hi 

Interesting group I have a question 

It's clear to use a  emotion recognition  software  as FaceReader or Emotient and another. My question is, What type the software is compatible with the E prime software that I can synchronize between both? Some ideas. Thanks 

@Jose > Noldus'Observer XT can synchronize E prime and FaceReader (and many other software and hardware that can receive triggers)