A definition of the term encoding variability principle is presented. The principle was formulated by the American psychologist Gordon Howard Bower. Encoding variability refers to the degree of variability in the environment and mood in which one learns the same material.
Increasing Your German Shepherdâs Lifespan. While German Shepherds can live 11 years on average, you can find a way to make your best dog buddies stay longer by your side. The key is in ensuring that they are getting the right amount of nutrition and exercise. Here are some tips on how to make that happen. Maintain a healthy weight.
Rating Newest Oldest. Best Answer: They usually live for about 12-15 years. They can live up to 20, but that is extremely rare. I have a sheltie and she is about ten and she sounds like the spitting image of your dog in activity.It isn't unusual for them to start slowing down at that age.t depends on quality of breeding and line, but a well bred sheltie who has been properly cared for can go as far as 18. Average is about 14-15. Source(s): Rescuer, vet tech, groomer and show exhibitor of Shetland sheepdogs for 20 years.