In terms of the psychological effect of this: i always assume that both are more probable to be strong if a player does this. I assume that the first bet is more likely to be weak, the 2nd one rarely being a bluff.
As for other people, i have no idea. I'd think smart players realize the 2nd one isn;t a bluff (although its really a different line altogether so mabye not).

Regarding the hands, I really hate double barreling the turn in the first place. Since this player probably doesn't have any hands with 2's and 4's in his range, when he calls the flop to have a pair he has to have a pocket, or Tx. A lot of people will c/c this with A high. So basically your doubling into a strong range on the turn, AND he's not gonna give you any credit. Just double barrel tight when the A comes on boards like these.

Hand 2: Lead flop, i assume this guy is gonna check behind this board a decent amount (if he's c-betting everytime ignore this advice). As played, i like the turn lead. As unbalanced as it is, the bet has a ton of value and if you check a lot of times you're letting T8 and hands like that draw with sick sick equity.