Low percentage correct and FED noise

[dautan...@gmail.com]

Hello,

I am using the FED3.0 in the inside cage configuration.

I am doing 10 cage at the same time in a dark-light classic cycle.

However, I start to realized that the % of correct is very low.

I trained the mice for sugar pellet habituation then in free feeding, then switched to FR1.

However, while in normal operant box after 1-2 days I managed to have more than 80% correct, here after more than 10 days my mice stil do arround 20-30% incorrect...

I was wondering if the fact that each mice can hear the correct/incorrect noise related to other boxes if it can affect their performance?

Thanks

[Nikolas Hayes]

I wonder how much the buzzer pairing even helps. I have a few fed3's where the buzzer mysteriously doesnt work but everything else does... but I think the mice still learned fine on fr1. I haven't deeply analyzed the data but I just went and looked at left right ratio from that and eyeballing it it looks like the ones without the buzzer did just as well -- one is even better than most of the ones with buzzers.

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[Lex Kravitz]

Haha yeah, I've wondered how necessary the buzzer or lights are for training, but I haven't explored this systematically.  I think the main auditory cue they are paying attention to with FED3 is the hopper motor moving.

In terms of active/inactive performance, we also see ~20-30% incorrect pokes on a straight FR1 task.  This may be a feature of the overnight sessions, as mice are awake and explore both pokes to some degree.  In Figure 4 of the eLife paper we showed FR1 responding across a few days - they do ~70%/30% active/inactive, with slightly better performance (higher active %) during the daytime.     

I don't think it's the sound of the devices that's causing this, I think the FED3 is just easy to explore and poke so they continue to explore both sides.  If you want to get the inactive pokes lower, you could introduce a time-out on that side to try to keep them away from it.