It may thus be that larger relative brain sizes can enhance the ability to discriminate differently sized objects at this small scale.
Instead it tests whether the rats are able to: (i) discriminate between differently sized rewards; (ii) to associate the different reward magnitudes with the different goal arms of the maze; while (iii) also controlling for their ability to make the effortful response (i.e. climb barriers).
The same study showed also that when participants were asked to discriminate two differently shaped objects according to surface area, their performance did not differ from their performance during the volume task.
By having multiple LWS opsins with slight variation in spectral sensitivity, female guppies may be able to better discriminate among differently coloured males [ 51, 52] or the brightly-coloured fruits that occasionally fall into the guppy's streams [ 53].
In between-population male mate choice tests, red Tropheus "Moliro" males expressed assortative courtship preferences that were independent of female courtship (Zoppoth et al., 2013), which raises the possibility that males of other color variants also discriminate against differently colored females.
Although we do not think that the rather small body differences between the great apes accounted for their different performance, testing them on, for example, a haptic version of the task in which the subjects have to discriminate between differently sized objects via touching would be an interesting comparison (see Hille et al. 2001; Kahrimanovic et al. 2011 for studies with monkeys and humans).
Discriminations means between-persons differences, which is to say, two people are discriminated if they score differently on the instrument, and not discriminated if they score the same.
The country's telecom regulator, the Bundesnetzagentur, said it would review the new tariff structure for potential violations of network neutrality principles, which generally hold that the government and Internet service providers should not discriminate or charge differently, based on the customer or the type of content.
We show that foraging bumblebees can learn to discriminate between two differently polarized targets, but only when the target artificial "flower" is viewed from below.
