A group of psychologists recently investigated the temporal development of emotions young women experience which are being put back in diapers by theirs husbands / boyfriends as part of their diaper training. They summarized their results and insights and developed the so-called Four psychological phases of diaper training (FPPDT) model, which is shown in the following:
1. Denial / Bargaining. At first, most young women felt quite uncomfortable in their new underwear. They were very reluctant to use them for their intended purpose, instead, they asked frequently for toilet access. Some of them even tried to get rid of their diapers or asked their boyfriends / husbands to be allowed to wear panties on various occasions (in case their former underwear had not been completely removed, as it is recommended by the researchers).
2. Anger. Once they realized that their complaints and begging did not help them to get out of their diapers and getting rid of them by themselves would immediately lead to punishments (delayed or cancelled changes, spankings, enemas, suppositories, …), most young girls showed some signs of anger: some of them tried to punish their boyfriends / husbands by not speaking to them for days, others tried to take revenge by consuming large amounts of fluid in order to increase the work for their caregivers, not realizing that this actually helped significantly with their diaper training since they became more and more used to wetting them.
3. Depression. Realizing that all their anger and pouting was futile effort, a lot of young women showed signs of depression. While wearing and wetting their diapers as they were supposed to, they showed only limited interest in their environment. Instead, they spent a lot of time laying in bed completely covered by their blanket or on the couch, watching TV. Others gave the impression that they became weak-willed: they did not fight any urges concerning their diaper usage, and even when it came to diaper changes, they showed not a single sign of resistance.
4. Acceptance. In the final stage, all young women had come to terms with their new underwear. While only a small part seemed to be neutral about their diapers, the major part actually seemed to enjoy certain aspects of them. A survey at the end of the investigation revealed that only 2 out of 10 women wanted to go back to panties. The others stated that they found more comfort in their diapers as they did in their former underwear, and 3 of them had even lost a significant part of their bladder control since they became so comfortable with using them all the time.
Source for the above text: https://dipsandlife.tumblr.com/post/179520685441/a-group-of-psychologists-recently-investigated-the