أرسل هذا في رسالة قصيرة: To thank or not to thank: Understanding the differences between gratitude and indebtedness after receiving a favor through emotion appraisals, motivations and behaviors

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| |  | ||   / _ \\   | |/ //  /_   _//  /_   _// 
| |/\| ||  | / \ ||  | ' //    -| ||-     | ||   
|  /\  ||  | \_/ ||  | . \\    _| ||_    _| ||   
|_// \_||   \___//   |_|\_\\  /_____//  /__//    
`-`   `-`   `---`    `-` --`  `-----`   `--`