Yes, it is!
How would the following be classified in behavioural terms?
Do you mean using the terms above? Unless you're looking at a single interaction by itself, I think there will tend to be a mix of the different processes going on. Also, all the above terms are to do with learning - i.e.
changing behaviour - so if that isn't happening then these terms may not be appropriate.
Making the right thing easy and the wrong thing difficult?
A mixture of negative reinforcement, punishment and (possibly) reward.
Using assertive body language to a bargy horse?
Depending on what is actually going on, there could be an element of punishment. Or the horse may decide, based on past experience, that barging won't gain anything with someone who is behaving assertively.
Using passive/non threatening body language for a scared horse?
With what result? Mainly desensitization with some reward perhaps, but with negative reinforcement and/or reward going on too if you are actually getting the horse to do something. Or the horse may already have learned not to be scared of someone who is showing non-threatening body language.
Mainly negative reinforcement, with some desensitization perhaps (at least for a first-time join up).
In all the above, there also could well be a bit of classical conditioning (see below) going on at the same time.
Is there a difference between purely behavioural approaches and those that use human-horse communication/relationship. Or can those also be understood behaviourally?
I think there
is a difference, but "learning theory" is always going to be an important part of the story.
I think there are few more categories of behavioral approaches that are crucial with a flight animal:
Systematic desensitisation: presenting a feared stimulus (eg a plastic bag) in a graded way until the horse's anxiety response fades and the horse becomes comfortable with it.
Habituation: the final extinguishing of the anxious response
And there's also:
Shaping: positive reinforcement of naturally occurring behaviours to build up
behavioural sequences gradually.
Here's a few more:
Imprinting - learning occurring in the period after birth where the foal learns about its dam (including recognition). This is similar to, but probably not exactly the same as, what happens to chicks and other birds.
Flooding - a form of desensitization in which a horse is confined or restrained so that it cannot escape while being exposed repeatedly to the stimulus, until the horse habituates to stimulus.
Other kinds of learning involve forming an association between two events.
Classical conditioning - Here a horse learns that a signal or cue, initially of no significance, is followed by an event or stimulus which is significant (and which produces a response). For example, in the wild, the appearance of a predator may be preceded by the alarm call of a bird. By learning this natural signal, a horse's ability to survive may be increased. In the domestic setting, a horse may similarly learn to associate the sound of buckets with feeding. An example in training is the teaching of riding aids such as the voice.
All the positive/negative reinforcement/punishment combinations given above are forms of "operant conditioning" - or "trial and error learning" to give it a less jargony name. Here the performance of a behaviour is changed by the consequences of that behaviour, which may be pleasant or unpleasant.
Observational learning (learning by watching other horses or people doing things) - there a real dearth of hard evidence for this in the horse, but I don't see why it can't happen at some level.
Or to ask the question in another way:
Do the things that 'work', work for the reasons people say they work. Eg does lots of groundwork build respect because the horse recognises you are leader coz you can move his feet around - or is it purely about pressure/release so it's actually simply negative reinforcement that results in the horse behaving 'respectfully'.
I am strongly inclined to think it's the latter. At least, the behaviour seems to me to be fully explicable in terms of learning theory. Interactions between dominant and subordinate horses can also be explained this way, without having to suppose the horse experiences the same kind of thoughts and feelings of respect that we do. However, the end result is behaviour that looks "respectful" to us. The same would apply to other forms of leadership.
I can see why people find the language of leadership and respect attractive though.