Here are a few options for a description of the WordPress post tag “發展心理” (Fāzhǎn Xīnlǐ – Developmental Psychology) in Traditional Chinese, catering to different needs:

**Option 1: Concise and General:**

> 探索人類生命歷程中，從出生到死亡，心理與行為的變化。包含認知、情感、社會性等多個層面。
>
> * (Explore the changes in psychology and behavior throughout the human life course, from birth to death. Covers cognitive, emotional, social, and other aspects.)

**Key Features:**
* Concise and easily understood.
* Covers the core concept of developmental psychology broadly.

**Option 2: More Informative:**

> 連結生命不同階段，探討認知、情感、社會、道德等心理與行為發展的規律與機制。這包括嬰幼兒、兒童、青少年、成年，甚至老年，每個階段獨特的挑戰與成長。
>
> * (Connects different life stages, exploring the rules and mechanisms of cognitive, emotional, social, and moral psychological and behavioral development. This includes infants, children, adolescents, adults, and even the elderly, with the unique challenges and growth of each stage.)

**Key Features:**
* More details about what developmental psychology covers.
* Mentions all the life stages it applies to.

**Option 3: Emphasis on Research (If your blog covers that):**

> 涵蓋發展心理學的相關研究，包括理論、實證研究、以及對日常生活中的應用分析。瞭解人類發展，並提供有力的實證支持。
>
> * (Covers research related to Developmental Psychology, including theories, empirical studies, and analysis of applications to daily life. Understanding human development and providing strong empirical support.)

**Key Features:**
* Emphasizes the research aspect.
* Highlights practical applications.

**Option 4: Inviting and Engaging:**

> 想知道為什麼孩子會這樣想、為什麼青春期充滿挑戰？發展心理學，帶你深入探索人類成長的奧秘！讓我們一起瞭解不同階段，心理與行為的變化，解開生命中的 Puzzle！
>
> * (Want to know why children think like that, or why adolescence is so challenging? Developmental psychology will bring you to explore the mysteries of human growth! Let’s learn together about the changes in psychology and behavior at different stages, unraveling the puzzles of life!)

**Key Features:**
* More engaging, with a rhetorical question to grab attention.
* Highlights the mystery and appeals to curiosity.

**Choosing the Best Option:**

* Think about your target audience and the overall style of your blog.
* If you’re aiming for a general audience, Option 1 or 4 are good.
* If you want more detail, choose Option 2.
* If your blog focuses on research, opt for Option 3.

Remember to replace the placeholder text with your chosen description within your WordPress tag editor. You can also adjust the wording slightly to better fit your specific content. Good luck!