Table 1.

Details and durations of frustration tests within test battery. For those based on existing tests, source, and modification(s) are stated.

Test No.	Test Name	Summary of Details of Test	Source/Modification in Proposed Test	Duration (Minutes)
1a	High value (4 treats)	Dog’s name called, offered 4 small treats. Repeated 5 times in total, 10 s interval between trials—delayed reward	[7,20] Downshift in quantity rather than quality; reduced number of trials/test duration	2
1b	Low value (1 treat)	Dog’s name called, then offered 1 small treat. Repeated 5 times in total, 10 s interval between trials—reduced reward
1c	No treat	Dog’s name called, then offered empty hand/no treat. Repeated 3 times in total, 10 s interval between trials—absent reward
2a	Inability to access items	Dog attached to wall tie out by lead. A range of toys are placed out of reach by experimenter.	Developed de novo	2
2b	Ease of removal of a range of items	After accessing items for 30 s, experimenter removes items.
3	Delay in leaving a room when lead clipped on	Lead clipped on dog, safety/baby gate partially opened and motion to leave room, however experimenter remains stationary for 1 min.	Developed de novo	1
4	Dog ignored whilst in test room	Experimenter sits on sofa in room reading book for 5 min ignoring dog.	Developed de novo	5
5	Ability to access food denied, restrained by lead	Dog on lead held by experimenter. Treat thrown in front of dog, dog permitted to access it. Repeated 5 times in total, 10 s interval between trials. 6th treat thrown beyond reach of dog, not permitted access to it for 1 min.	[29] Increased number of treats before access denied; thwarted by lead rather than body blocking	2
6a	Left alone, experimenter out of sight	Experimenter leaves dog in test room for 30 s, out of sight of dog, outside test room.	[29] Left alone by experimenter rather than owner, in room rather than tethered	1
6b	Left alone, experimenter in sight	Experimenter leaves dog in test room for 30 s, in sight of dog separated by safety/baby gate.